JPS6156480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for ensuring isolation of the inside and outside of the area when goods are brought into a special area, such as a radioactive material contaminated area or a harmful bacteria cultivation room in a nuclear facility. .

Conventionally, there are several methods for transporting articles into such special areas, the most typical of which are the back-in method and the airlock method.

In particular, since the back-in method is a technology closely related to the present invention, an overview thereof will be given below. As shown in FIG. 1a, a vinyl bag 2 is attached to a port 1 formed in a partition wall separating a clean area A and a radioactive material handling area B using an O-ring 3 and a clamp 4. Note that an inner cover 5 is attached to the opening of the port 1. Next, as shown in Figure b,
The material to be transported 6 is placed in the vinyl bag 2, and the folded portion ○A (4 pieces stacked) of the vinyl bag 2 is welded by high frequency. The inner cover 5 is removed, the vinyl bag 2 and the material to be transported 6 are pushed into the radioactive material handling area B, and the vinyl bag 2 is cut at the circle (see c in the same figure). Then, as shown in Figure d, the object 6 is separated and transported from the clean area A to the radioactive material handling area B.

When the vinyl bag 2 becomes short, the article is carried in while replacing the vinyl bag 2 as shown in FIG. From the state shown in Figure a, as shown in Figure b, remove the clamp 4, remove all but one O-ring 3, and fold back the end of the vinyl bag 2 to the front of the remaining O-ring 3. Next, the article 6a is placed in a new vinyl bag 2a, and the bag is placed over the port 1 (see c in the same figure). Then, as shown in Figure d, insert the new vinyl bag 2a into the O-ring 3,
Attach with clamp 4, remove inner cover 5, and remove old vinyl bag 2. In this way, the material to be transported 6
a from clean area A to radioactive material handling area B
It can be transported to.

However, with this vinyl bagging method, it is difficult to fold the vinyl bags and to fuse them at the same location, the vinyl bags have to be replaced frequently, and the installation of the vinyl bag to the port is complicated and cumbersome. It required a lot of effort, time, and skill to transport the items.

On the other hand, the airlock method involves setting up several independent areas (chambers) and transporting the material through each area, which requires a large space and has many difficulties in terms of radiation control.

The purpose of the present invention is to eliminate such drawbacks of the prior art, while strictly observing the basic condition of reliably maintaining separation between the general area and special area when transporting goods.
To provide a method that facilitates carrying-in work, does not require skill, and can reduce labor and time required for carrying-in articles.

Hereinafter, the present invention will be explained in detail based on the drawings.
FIG. 3 is an explanatory diagram showing an embodiment of the loading method according to the present invention. An attachment port 11 is replaceably attached to a fixed port 1 formed in a partition wall such as a glove box or cell that partitions a clean area A (general area) and a radioactive material handling area B (special area). This attachment port 11 consists of a substantially cylindrical member 20 having an inwardly bent portion at the lower end, a packing 21 attached to the outer surface of the member, and a cylindrical vinyl cylindrical member extending upwardly from the cylindrical member 20. The attachment port 1 is composed of a seat 22 and a plurality of rod-shaped holding jigs 23 erected at the inner bent portion of the cylindrical member 20.
1 is located inside the fixed port 1, and the packing 21 slides on the wall surface of the fixed port 1. A cylindrical vinyl sheet 22 is placed over the fixed port 1, and an O-ring 3, a flat packing 8, and a tightening band 4 are attached. Attachment port 11 and fixed port 1
The gap between the two is sealed. Note that a vinyl bag 12 is attached to the attachment port 11 in advance.

First, as shown in FIG. 3a, the article 16 to be transported is placed in the vinyl bag 12. Next, figure b
As shown in FIG.
Insert and set the a end. Setting is performed by applying adhesive to the setting surface (○) and adhering it. Of course, it may also be set by fusing. This work takes place in a clean area. After that, cut the old vinyl bag 12 at the part marked with ◯ and ◯. Then, the carried object 16 is separated and moved to the clean area A.
From there, they will be transported to radioactive material handling area B (see Figure 3c). The new vinyl bag 12a is ready for the next article to be carried in. Items can thus be loaded by repeating this simple procedure until the attachment port 11 is full of vinyl bag scraps.

Now, when the amount of vinyl bag chips accumulated on the holding jig 23 of the attachment port 11 reaches a certain amount, the attachment port 11 needs to be replaced. The replacement work is performed as shown in Figure 4. First, as shown in figure a,
Remove the tightening band 4 that fastens the cylindrical vinyl sheet 22 of the old attachment port 11, remove the upper O-ring 3 except for one, and leave the end of the cylindrical vinyl sheet 22. O-ring 3
Fold it back to the front. Then, the fixed port 1 is covered with the cylindrical vinyl sheet 22a of the new attachment port 11a. Next, the old attachment
Remove the cylindrical vinyl sheet 22 of the port 11, and attach the cylindrical vinyl sheet 22a of the new attachment port 11a to the O-ring 3, flat packing 8,
Fasten with the tightening band 4, and push in the old attachment port 11 with the new attachment port 11a (see Fig. 4b). Then, as shown in Figure 4c, the old attachment port 11 moves out of the radioactive material handling area B, and the new attachment port 11
The port 11a is set and prepared for carrying in goods.
After that, the goods may be carried in according to the procedure shown in FIG.

The bag may be made of any material that can be fused or bonded, such as vinyl chloride or polyurethane, and does not necessarily have a shielding effect.

The present invention is an article carrying method configured as described above, which can reliably maintain separation between the inside and outside of the carrying area, so it can be suitably used, for example, in areas where alpha materials such as plutonium are handled. The work is easy, as there is no need to fold the bags over or high-frequency weld them at the relevant locations, and the frequency of replacing attachment ports is much lower than that of conventional vinyl bags, making it easy to transport goods. This can bring about a number of excellent effects, such as shortening the time required for the process and reducing labor.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams showing the steps of a conventional method, and FIG. 3 is an explanatory diagram showing an embodiment of the article carrying method according to the present invention. FIG. 4 is an explanatory diagram showing the procedure for replacing the attachment port. 1...Fixed port, 11...Attachment
Port, 12, 12a... Bag, 16... Item to be transported, 20... Cylindrical member, 21... Packing, 2
2, 22a... cylindrical sheet, 23... holding jig.

Claims (1)

[Claims] 1. An attachment port is replaceably attached to a fixed port formed in a partition wall that partitions a general area and a special area, and a seal is formed between both ports, and the attachment port is fused or A bag is set by gluing, an item is placed in the bag, another bag is placed in the attachment port over the item, and the bag facing the special area is cut off. A method of transporting goods in which the goods to be transported are released in a special area. 2. The replaceable attachment port consists of a cylindrical member, a gasket attached to the outer surface of the cylindrical member, and a cylindrical sheet continuous with the cylindrical member, and the attachment port is located inside the fixed port. The method according to claim 1, wherein the packing is in sliding contact with the fixed port wall, and the cylindrical sheet is placed over the fixed port and fixed with an O-ring and a tightening band to maintain a seal with the fixed port. . 3 When replacing the attachment port, remove the O
Remove the ring and tightening band, and install the new attachment.
3. The method according to claim 2, wherein the old attachment port is pushed in at the port, and the cylindrical seat of the new attachment port is fixed to the fixed port with an O-ring and a tightening band.