JPH0616391Y2 - Radioactive waste storage container - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a radioactive waste storage used for storing incineration ash containing radioactive materials generated from nuclear power plants, powdery radioactive materials, etc. It concerns a container.

(Prior Art) Conventionally, a method has been adopted in which low-level radioactive waste generated from a nuclear power plant or the like is stored in a metal container such as a drum and temporarily stored. As a storage container for this purpose, an open drum can of which the inner lid is not fixed and only the outer lid is fixed by a lever type or a tightening type with bolts and nuts is widely used. When stored, its sealing performance is not always perfect, and it is extremely difficult to automatically tighten the band, especially the lever-type band, and the worker is exposed to radiation because the outer lid must be manually attached. There were also fears.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and can secure a perfect sealing property even when a powdery radioactive waste is stored. It was completed for the purpose of a radioactive waste storage container that can perform lid work fully automatically and can eliminate the risk of exposure to workers.

(Means for Solving the Problem) The present invention has a flexible packing that forms an inward projection on the inner surface slightly lower than the rim of the container body and makes a full contact with the inner peripheral surface of the container body on the outer periphery. The projecting inner lid is supported on the upper surface of the projection, and the outer edge having a plurality of elastic claws engaging with the curl portion is attached to the rim of the container body.

(Embodiment) Next, the present invention will be described in more detail with reference to an illustrated embodiment. (1) is a container body such as a 100 open drum can, and (2) is a curl portion formed at the rim thereof.
Three or more protrusions (3) are provided inwardly on the inner surface of the container body (1) which is lowered by about 10 to 30 mm from the rim, and the inner lid (4) is provided on the upper surface of the protrusion (3). Is supported. The inner lid (4) is formed by projecting a flexible packing (5) made of an annular rubber or the like, which is in full contact with the inner peripheral surface of the container body (1) on its outer periphery, and mechanically The seal can be easily made by pushing it into the inside of 1). An outer lid (6) is attached to the rim of the container body (1).
The outer lid (6) has a plurality of elastic claws (7) that can be engaged with the curl portion (2) at the rim of the container body (1), and the lower end of the elastic claws (7). Since it is opened outward as clearly shown in Fig. 2, the elastic claw (7) curls only by mechanically pressing the outer lid (6) toward the rim of the container body (1). The outer lid (6) can be attached by being engaged with the portion (2). A packing (8) that is in close contact with the curl portion (2) is also provided on the peripheral portion of the outer lid (6). The protrusions (9) provided on the outer periphery of the container body (1) are for hooking the transfer claw when transferring the container body (1).

(Function) In this structure, radioactive waste such as incinerated ash generated from a nuclear power plant is filled inside the container body (1), and then, for example, an electromagnet type detachment device or inner lid is used. The inner lid (4) is attached to the container body by using a claw opening / closing type attachment / detachment device that opens and closes the inner lid by opening and closing the claw hooked on the peripheral edge part.
Push it down toward (1) and support it on top of the protrusion (3) as shown. As a result, the flexible packing (5) on the outer periphery of the inner lid (4) comes into full contact with the inner peripheral surface of the container body (1) to perform the primary sealing. Next, if the outer lid (6) is pushed down toward the rim of the container body (1) in the same manner with an electromagnet type detachment device, a plurality of elastic claws (7) provided on the outer periphery of the outer lid (6) will
The outer lid (6) is elastically engaged with the curl portion (2) at the rim of (1), and is attached to the container body (1). Along with this, the packing (8) of the outer lid (6) is in close contact with the curl portion (2) to perform a secondary seal, and thus the inner lid (4) and the outer lid (6) form a two-stage structure. Since sealing is performed, high sealing performance can be secured. Further, both the inner lid (4) and the outer lid (6) can be opened and closed by an automatic machine by the device such as the claw opening / closing type attaching / detaching device and the electromagnet type attaching / detaching device described above, so that the worker is not exposed to the radiation. Can be prevented.

The storage container provided with the inner lid (4) and the outer lid (6) as described above,
Shielding radioactive waste from the outside air by adopting a method to open the inner lid (4) and outer lid (6) alternately when transferring powdery radioactive waste such as incinerated ash from the hopper to the storage container It is possible to work while doing so, and the merit of this point is extremely large.

(Effects of the Invention) As described above, the present invention enables complete double sealing by the inner lid and the outer lid even when storing powdered radioactive waste. Since the lid-covering work can be automatically performed, there is an advantage that the worker can be prevented from being exposed to radiation. Therefore, the present invention solves the problems of the conventional radioactive waste storage container,
Its practical value is enormous.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a main part thereof. (1): container body, (2): curl portion, (3): protrusion, (4): inner lid, (5): flexible packing, (6): outer lid, (7): elastic claw.

Claims (1)

[Scope of utility model registration request] 1. A flexible packing (5) which is formed with an inward projection (3) on the inner surface slightly lower than the rim of the container body (1) and is in full contact with the inner peripheral surface of the container body (1). ) Inner lid protruding from the outer circumference
(4) is supported on the upper surface of the protrusion (3), and the outer edge (6) having a plurality of elastic claws (7) engaging with the curl portion (2) is provided on the rim of the container body (1). ) Is attached to the radioactive waste storage container.