JPH11142590A - Method and device for temporary shielding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary shielding device which has a light weight, can be handled easily, and can be treated easily even when the device is contaminated with radioactivity and a temporary shielding method. SOLUTION: A flexible bag 2 is attached to a wall surface near a gap section 12 so as to temporarily shield the gap section 12 from radiation. The bag 2 is deformed to the shape suitable for shielding the clearance section 12 by supplying a shielding fluid 14 to the bag 2. Therefore, the clearance section 12 is shielded with the bag 2 containing the fluid 14. The bag 2 has an inlet 6 and an outlet 3 for the fluid 14 and a hose 5 which can adjust the fluid 14 accepting position of the bag 2 is connected to the inlet 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary shielding method and a temporary shielding device for reducing or eliminating leakage from a gap portion of a shield, for example, radiation leakage.

[0002]

2. Description of the Related Art Heretofore, in order to reduce the amount of radiation leakage from a gap or the like in a shield, a solid shielding material or a shielding member has been temporarily installed in the gap. In order to adapt the solid shielding member to the shape of the gap, it is necessary to shape it to the desired shape, but since the solid shielding member is heavy, it is necessary to respond to safety and workability during use .

[0003] Further, since the gap portion is usually not uniform in shape, when temporarily shielding the gap portion, work such as stacking a plurality of small shielding members according to the shape of the gap portion is required. It is common to do.

[0004]

At this time, since the space dose rate of the radiation is high in the gap portion, it is difficult for the worker to handle a plurality of shielding members even in the temporary installation work of the shielding members. Has a large effect on the dose equivalent, which is not preferable. In addition, the shielding member is generally made of lead block, lead wool, iron block, etc., but since these are heavy, not only it takes time to transport, but also safety such as dropping during handling. Countermeasures were required, which resulted in increased worker exposure.

Further, when a shielding member is used in an area contaminated with radioactivity, the shielding member itself is often treated as radioactive waste after use, and naturally, there are various restrictions, so that a heavy solid material is used. Disposal of the shielding member is not easy. Accordingly, an object of the present invention is to provide a temporary shielding device that is lightweight and easy to handle, and that can be easily disposed of even after being contaminated with radioactivity. It is another object of the present invention to provide a method for performing temporary shielding using such a temporary shielding device.

[0006]

In order to achieve the above object, according to the present invention, a flexible bag is provided near the gap to temporarily shield the gap from radiation. A shielding fluid is supplied to the bag, the bag containing the shielding fluid is deformed into a shape adapted to shield the gap, and the gap is shielded by the bag containing the shielding fluid. A temporary shielding method is provided. In addition, from the above-described object, according to the present invention as set forth in claim 2, the temporary shielding device for temporarily shielding the gap portion with radiation includes a supply port and a discharge port for the shielding fluid, A flexible bag detachably attached to a nearby wall surface, and attaching means for detachably attaching the bag to the wall surface;
A tubular member connected to the supply port and capable of adjusting a receiving position of the shielding fluid into the bag, and deforming the bag containing the shielding fluid into a shape adapted to shield the gap. Then, the gap portion is shielded by a bag containing the shielding fluid.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. FIG.
It is a conceptual diagram which shows the whole structure of the temporary shielding apparatus 1 by this invention in an assembled state, and the temporary shielding apparatus 1 has the flexibility and / or elasticity which the shielding material discharge hose (discharge port) 3 was attached to the bottom part. And a hose (tubular member) 5 of an appropriate length connected at its lower end to a supply port 4 provided at the top thereof. The upper end of the hose 5 is connected to a wrapper opening 6 for inserting a shielding material. The hose 5, the shielding material storage bag 2, and the horn 6 are firmly connected by a fastening member such as a band 7 so that the shielding material does not leak. The size and material of the storage bag 2, the hose 5, the wrapper opening 6, and the like can be appropriately selected and changed as needed.

The temporary shielding by the temporary shielding device 1 will be described with reference to FIGS. In FIG.
10 is a wall, and 11 is a shield. This shield 1
1 shields the space defined by the wall 10.
For example, when it is necessary to pass a penetrating object (not shown) through the shield 11, a gap portion 12 may be formed in the shield 11, but this must be shielded.

Therefore, according to the present invention, the gap 1
2, a double-sided adhesive tape (attachment means) 13 that can be removed after use is attached to the wall 10 near the storage bag 2.
Is installed with the supply port 4 facing up. Double-sided adhesive tape 13
, The exposure of the worker due to the work in the gap portion 12 to be shielded is minimized.
Then, a hose 5 is connected to the supply port 4 with a band 7,
Next, a wrapper opening 6 is attached to the hose 5 with a band 7, and the shielding material discharge hose 3 is similarly bound with the band 7,
Close that exit. The wrapper port 6 is provided with a liquid shielding material (shielding fluid) 14 which is preferably made of water, which is a water-saving material which is easy to dispose of, because the hose 5 saves labor for transporting heavy objects near the gap 12 to be shielded. It can be arranged at the shielding material receiving position where it is easy to flow. Note that the hose 5 and the horn 6 are also attached to the double-sided adhesive tape 13. By employing the double-sided adhesive tape 13 and the flexible storage bag 2, not only the operation time is further shortened, but also the operation of shaping the shielding member according to the shape of the gap portion as in the related art becomes unnecessary.

Thereafter, when the shielding material is poured into the storage bag 2, the storage bag 2 is deformed and expanded, as shown in FIG. 2, and the gap portion 12 is covered by the storage bag 2 of the temporary shielding device 1. And the space defined by the wall 10 is isolated and shielded. After the temporary shielding device 1 is used or becomes unnecessary, the band 7 of the shielding material discharge hose 3 is removed to discharge water, and the temporary shielding device set is easily removed.
It can be returned to the state before use.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible. For example: 1) Although the invention has been described exclusively with respect to the prevention of radiation leakage, it is also applicable to the temporary leakage prevention of other things such as fluids. 2) In the embodiment, a double-sided adhesive tape is used to attach the storage bag to the wall surface. However, a single-sided adhesive tape may be used. Such a member as described above may be used. 3) In the embodiment, the storage bag 2 and the hose 5 are separate bodies,
These may be formed integrally. 4) Of course, the hose 5 and the horn 6 may be formed integrally.

[0012]

According to the first aspect of the present invention, in the temporary shielding method, a flexible bag is attached to a wall surface near the gap to temporarily shield the gap from radiation. Supplying the shielding fluid to the bag, deforming the bag containing the shielding fluid into a shape adapted to shield the gap, and shielding the gap with the bag containing the shielding fluid. According to the second aspect of the present invention, the temporary shielding device for temporarily shielding the gap from radiation has a supply port and a discharge port for the shielding fluid, and can be detachably attached to a wall near the gap. A flexible bag, an attaching means for detachably attaching the bag to the wall surface, and a tubular member connected to the supply port and capable of adjusting a supply position of the shielding fluid into the bag. And providing the bag containing the shielding fluid with the gap portion. Deformed into a shape to accommodate the shield, so that to shield the gap section in a bag containing the shielding fluid. As described above, in the first and second aspects of the present invention, since a fluid, preferably water, is used as the shielding material, it is easy to dispose and easily control the contamination. To prevent exposure of the shielding fluid to a radioactive atmosphere, thereby preventing contamination of the shielding fluid and eliminating the need for handling as radioactive waste, There is no need to use shields such as iron and lead blocks, which are heavy and difficult to handle after use.They are easy to handle, and since the shielding material is a fluid, if necessary, remove The shielding operation can be performed by supplying the shielding fluid from a remote position. This greatly contributes particularly to improving the workability of workers in a radiation environment, reducing the exposure dose, and improving the handling of radioactive waste.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram schematically illustrating the overall configuration of a temporary shielding device according to the present invention.

FIG. 2 is a perspective view partially showing an example in which the temporary shielding device of FIG. 1 is applied to a gap between wall bodies.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Temporary shielding device, 2 ... Storage bag (flexible and / or elastic bag), 3 ... Shielding material discharge hose (discharge port), 4 ... Supply port, 5 ... Hose (tubular member), 6 ... Wrapper Mouth, 10: wall, 11: shield, 12: gap, 13: double-sided adhesive tape (attachment means).

Claims (2)

[Claims] 1. In order to temporarily shield a gap from radiation, a flexible bag is attached to a wall near the gap, a shielding fluid is supplied to the bag, and the shielding fluid is stored in the bag. Deform the bag into a shape adapted to shield the gap,
A temporary shielding method for shielding the gap with the bag containing the shielding fluid. 2. A temporary shielding device for temporarily shielding a gap from radiation, comprising a supply port and a discharge port for a shielding fluid, and a flexible device detachably attached to a wall near the gap. A bag, a mounting member for detachably mounting the bag on the wall surface, and a tubular member connected to the supply port and capable of adjusting a receiving position of the shielding fluid into the bag. A temporary shielding device in which the bag containing the shielding fluid is deformed into a shape adapted to shield the gap portion, and the gap portion is shielded by the bag containing the shielding fluid.