JPH0636071B2 - Nuclear material storage device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a nuclear material storage device installed in a glove box, and particularly to the storage device suitable for automatic storage and transportation.

[Background of the Invention]

In the conventional device, as described in Japanese Patent Publication No. 57-45949, a drive motor is provided in the shutter above the storage container so that the shutter itself can be opened and closed. But,
No consideration was given to the maintainability of the drive motor.

An example of a conventional storage device will be described below with reference to FIGS. 5 and 6.

The nuclear material storage device includes a storage container 2, a shutter 6, and a trolley 4.
Is made up of. The trolley moves freely on the rails 5 and puts the transport container 3 in and out of the storage container 2. The shutter 6 is normally closed, and is opened by the drive motor 9 when the transport container 3 is moved in and out of the storage container 2.

In order to prevent the nuclear fuel material from scattering into the room, the device is installed in the glove bed 1. Due to the disposition, the shutter 6 is located in the lower part of the glove box 1, so that the drive motor 9 may not be maintained. Moreover, since the radiation dose rate is usually high in the vicinity of the storage device, workers cannot enter. Therefore, the drive motor 9
In the event of a failure, all the transport containers containing the nuclear fuel material around it must be moved to another room, and then the drive motor 9 must be repaired or replaced, which is not an easy task.

Further, the shutter is heavy because it has a function of shielding the radiation from the nuclear fuel material.

[Object of the Invention]

The object of the present invention is to store the nuclear material in which the device is installed in a special airtight box called a glove box, which has particularly good maintainability and can open and close a heavy shutter reliably and statically. To provide a device.

[Outline of Invention]

The present invention relates to a plurality of storage containers provided in an airtight glow box, a shutter for opening and closing an upper opening of the storage container, and a trolley that moves in the glow box and transfers nuclear material to the storage container. In the nuclear material storage device, the shutter moves on a rail provided in front of the upper opening and includes a plurality of detection bodies for detecting an open / closed state of the shutter, and the carriage is the detection body. And a opening / closing means for opening / closing the shutter.

In the present invention, by opening and closing the shutter and confirming the opening and closing of the shutter by the moving truck, the maintenance target is improved because only the truck is to be maintained. In addition, a plurality of detectors provided on the shutter are detected by the detection means of the carriage, and the shutter is moved on the rail provided on the front surface of the upper opening of the storage container, so that the heavy shutter can be reliably and statically operated. Can be opened and closed.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

The present apparatus comprises a storage container 2 for accommodating a transfer container 3, a shutter 6 for closing an opening 18 in the upper part of the storage container 2, a carriage 4 and a glove box 1 for transferring the transfer container 3 to a predetermined storage container 2 and putting it in and out. It is composed of an airtight terminal block 20 for the purpose of supplying power inside and outside.

The trolley 4 travels on the rail 5 to transport the transport container. A shutter 6 is located below the rail 5, and a trolley 4 is provided with a shutter opening / closing device 19 for opening / closing the shutter 6.

The shutter 6 is supported via rails 7 on rails 8 fixed by the glow box 1. Further, the shutter 6 is provided with pins 13 and 14 that can be checked by the opening / closing device 19 and detectors 15, 16 and 17 for detecting the open / closed state of the shutter 6.

Next, the operation of the present apparatus will be described by taking the case where the transport container 3 is stored in the storage container 2 as an example.

The trolley 4 accommodating the transport container 3 travels on the trolley rail 5 and stops at a predetermined storage container 2 position. After the carriage 4 stops traveling, the shutter 6 is moved to the right by grasping the pin 13 by the shutter opening / closing device 19, and when the shutter 6 opens to a predetermined position, the detector provided on the carriage 4 installs the shutter 6 on the shutter 6. The detecting body 15 present is detected, and the opening operation of the shutter 6 is stopped. Next, the transport container 3 stored in the carriage 4 is delivered to the storage container 2. After the transfer operation of the transfer container is completed, the shutter opening / closing container 19 is reversely operated to move the shutter 6 leftward. When the shutter 6 returns to the fixed position, the fixed position detector detects the detection body 17 to stop the closing operation of the shutter 6, and after releasing the pin 13 held by the shutter opening / closing device 19, the carriage 4 is at the original position. Return to. All of the above operations are automatically performed according to the instructions of the computer.

According to the present embodiment, it is not necessary to attach a drive motor to the shutter 6, maintenance of the shutter 6 is not necessary, and even if the number of shutters in the storage device increases, the motor for opening and closing the shutter is mounted on the carriage 4. Since the number of members provided is the same, there is no fear that the number of wires in the box will increase and the probability of failure will increase, and it is particularly suitable for storing a plurality of transport containers 3.

Further, since all the parts to be maintained are provided on the carriage 4, there is an effect that the apparatus can be maintained by moving the carriage 4 to an area where the gloves can be operated and the maintainability is greatly improved.

〔The invention's effect〕

According to the present invention, the maintenance and inspection of the device only needs to be performed by the trolley, the work time is greatly reduced, and the maintenance and inspection work can be performed in an area having a low radiation dose rate. It is also effective in reducing the exposure dose of. further,
According to the present invention, a heavy shutter can be opened and closed reliably and statically.

[Brief description of drawings]

FIG. 1 is a front view of an apparatus according to an embodiment of the present invention, and FIG.
FIG. 3 is a plan view, FIG. 3 is a front view of a shutter of the device of the present invention,
4 is a plan view of FIG. 3, FIG. 5 is a front view of a conventional example, and FIG. 6 is a sectional view taken along line AA of FIG. 1 ... Grove box, 2 ... Storage container, 3 ... Transport container, 4 ... Truck, 5 ... Truck rail, 6 ... Shutter body, 7 ... Roller, 8 ... Shatter rail,
15 ... Position detector, 16 ... Position detector, 17 ... Position detector, 19 ... Shutter opening / closing device.

Claims (1)

[Claims] 1. A plurality of storage containers provided in an airtight glow box, a shutter that opens and closes an upper opening of the storage container, and a trolley that moves in the glow box and transfers a nuclear material to the storage container. And a plurality of detection bodies for detecting an open / closed state of the shutter, wherein the trolley is used for the detection. A nuclear material storage device having a detection means for detecting a body and an opening / closing means for opening / closing the shutter.