JPH044240Y2 - - Google Patents

Description

[Detailed explanation of the invention] Equipment used in places contaminated by radiation, such as nuclear power plants, is generally covered with a cover to prevent contamination, and the cover is removed after use, or equipment that cannot be protected is protected from contamination. In the case of equipment, the stains are removed manually by wiping with a rag or the like after use. In particular, long devices such as cables were covered over their entire length with vinyl or the like, or wiped off and dyed after use.

As mentioned above, with this invention, most of the contamination countermeasures and decontamination of long cables were carried out manually, which resulted in an increase in work time, that is, an extension of the periodic inspection period, and also prevented an increase in the radiation exposure of workers. However, it was devised with the aim of creating a decontamination device that would reduce the working time and the amount of radiation exposure.

This invention installs independently driven drums at both ends of a flexible band or string-shaped decontamination body, wraps the decontamination body around a cable one or more times, and as the cable moves, the decontamination body moves into the decontamination device. This relates to a decontamination device that is characterized by having a stopper installed to prevent it from moving out of the cable.
The decontaminant is wrapped around the cable more than once, and both ends are wound on a drum to make the winding force variable.The decontamination body moves with the cable, allowing the contamination to be collected on the drum without being held in one place, and the decontamination body does not move outside of the designated location. The present invention aims to provide a decontamination device equipped with a stopper, which can be applied to various cable decontamination devices.

An example of the decontamination device of the present invention is shown in Figures 1 and 2.
The diagram will be explained. FIG. 1 is a schematic plan view of an embodiment of the decontamination apparatus of the present invention installed on a self-propelled inspection vehicle for inspecting contaminated floors, and FIG. 2 is a schematic side view thereof. A cable 2 necessary for a self-propelled inspection vehicle 1 is wound up or sent out by the rotation of a cable drum 4 mounted on the inspection vehicle 1 as the inspection vehicle 1 moves. On the other hand, the cable 2 is installed to pass through the decontamination device 10 mounted on the inspection vehicle 1, and within the cable 2, a long decontamination body 6 in the form of a flexible band or string is rotated around the cable 2 once. The two ends thereof are wound around drums 3 and 3a, which are driven by motors 9 and 9a, respectively. Also, stoppers 5 and 5a are provided on both sides to prevent the decontamination body 6 from moving out of the decontamination apparatus 10 as the cable 2 moves, also serving as a guide for the cable 2.

The operation of the present invention will be explained. When moving the inspection vehicle 1, especially when sending out the cable 2,
Since no tension is applied to the decontamination body 6 by the motors 9, 9a, no extra load is required for sending it out. On the other hand, when winding up the contaminated cable 2 onto the cable drum 4, the motor 9a applies a load in the opposite direction to the drum 3 on the winding side to reduce the winding force of the decontamination body 6 around the cable 2. Can be controlled arbitrarily. In addition, since the decontamination body 6 is always wound up along with the winding of the cable 2, the contamination does not spread into the inspection vehicle 1, and the stoppers 5, 5a is installed. After the inspection is completed, the outer stopper 5a is opened as shown in FIG. 2, and the decontamination body 6 and drums 3, 3a can be easily replaced.

The present invention has the above configuration and has the following effects.

(1) There is no need for cable curing or wiping work, and the drum and decontamination body can be replaced with a single touch, making it possible to shorten periodic inspection periods and reduce radiation exposure.

(2) The tightening force and winding speed of the decontamination body can be adjusted depending on the degree of contamination of the cable, allowing for optimal decontamination work.

(3) The effect on the device can be reduced by adjusting the tightening force as described above. (It is also easy to do it manually.)

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of an embodiment of the decontamination apparatus of the present invention installed on a self-propelled inspection vehicle for inspecting contaminated floors, and FIG. 2 is a schematic side view thereof. 6... Decontamination body, 3, 3a... Drum, 2... Cable, 5, 5a... Stopper, 10... Decontamination device.

Claims (1)

[Scope of utility model registration request] Independently driven drums are installed at both ends of a flexible band or string-shaped decontamination body, and the decontamination body is wrapped around the cable one or more times, and as the cable moves, the decontamination body moves out of the decontamination equipment. A decontamination device characterized by having a stopper to prevent the decontamination from occurring.