JPH0641200Y2 - Telescopic decontamination house - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to the structure of a decontamination house for decontaminating radioactive materials in large equipment.

(Prior Art) Generally, when decontaminating a device to which radioactive substances are attached,
A decontamination house is used to prevent the contaminants from scattering during the decontamination work and spreading the contamination elsewhere. Especially when decontaminating large equipment, we hypothesized a decontamination house according to its size, but after the decontamination, the decontamination house will be dismantled because the decontaminated equipment will be moved. Was there.

Therefore, materials such as polyfilm used for the decontamination house had to be treated as radioactive waste.
Further, the cost required for assembling and disassembling is also heavily burdened each time.

On the other hand, as for the pollution of the equipment, the decontamination house is often rebuilt depending on the size of the equipment itself and the ratio of the decontamination area to the decontamination area, which inevitably increases the work load.

In many cases, the ceiling of the indoor decontamination area was not high enough for large equipment. If it is suspended in the decontamination house, the decontamination house is often installed after the decontamination place is installed at the decontamination place due to the height of the ceiling. The situation was not favorable for pollution control. Further, even when it is moved, re-curing of the material to be decontaminated or opening of the decontamination house in the plane direction causes contamination to easily diffuse, which is a problem.

(Problems to be solved by the invention) In view of the problems of the conventional decontamination house, the decontamination house can be expanded or contracted depending on the size of the decontamination equipment so that the narrow nuclear facility can be effectively used. The purpose is to do.

(Means for solving the problem by the invention) In a nuclear power facility, in a decontamination house for removing radioactive substances adhering to large-scale equipment, an openable and closable opening for loading a large decontamination object into the decontamination house Bring in the ceiling and the item to be decontaminated, set it on the floor and extend it upwards,
The decontamination house can be hermetically closed by forming a bellows side wall capable of covering the material to be decontaminated and closing the opening of the ceiling.

The opening of the ceiling is opened and closed by an upper traveling shutter mounted on both sides of the transverse shutter frame and a transverse shutter that can be opened and closed in a direction orthogonal to the upper traveling shutter in the transverse shutter frame. It has a manipulator insertion opening in the center, and the upper running shutter and the traverse shutter can move freely as the manipulator moves.

(Example) The decontamination house A is demonstrated based on FIG. Reference numeral 1 is a floor on which equipment to be decontaminated is attached. Reference numeral 2 is a bellows side wall, and 3 is a ceiling provided with an opening / closing opening. Reference numeral 5 denotes a telescopic arm, the upper end of which is pivotally attached to the side portion of the ceiling 3.

The decontamination device 4 is installed on the floor 1 in a state where the opening portion of the ceiling 3 is opened and the telescopic arm 5 is contracted to lower the side wall 2 made of bellows, and then the telescopic arm 5 is extended again. After extending the side wall to cover the decontamination device 4, the ceiling 3 is covered, and decontamination work is performed in a closed house.

2 and 3 show an embodiment of remote decontamination using the manipulator 11 from the outside to store the decontamination object 4 in the decontamination house A.

The structure shown in FIGS. 2 and 3 is such that the ceiling structure can be further extended in the front, rear, left and right directions. 3a and 3a 'are transverse shutter frames 7
The upper traveling shutter has one edge attached to both sides of a, and the other end can be retracted and retracted in the shutter storages 13 and 13 '. The transverse shutter frame 7a has a transverse shutter 7 movable in a direction orthogonal to the upper traveling shutter.
Is housed in the shutter housing 13 ″, 13 at both ends for winding and rewinding freely. 12 is an arm insertion part provided in the traverse shutter 7, from which the slave arm 11a of the power manipulator 11 is inserted. The arm insertion part 12 is used to move the upper and lower shutters 3a and 3a 'forward and backward, and to traverse the shutter 7.
The position can be arbitrarily changed as the vehicle travels left and right. The shutters are respectively wound in the storages 13, 13 ', 13 ", 13 and provided with a wiping device 14 for wiping off the contaminants adhering to the inner surfaces of the upper traveling shutters 3a, 3a' and the transverse shutter 7. ing.

The bellows that make up the side wall are made of a transparent material that allows external confirmation of the decontamination status. In addition, since there are many opportunities for disposal depending on the number of times of expansion and contraction, the structure does not include halides such as chlorine and metal noncombustible materials so that incineration can be performed at nuclear facilities.

Master-slave arm 11a of power manipulator 11
For example, the decontamination nozzle 16 attached to the hook 15 in the middle of the bellows side wall of the decontamination house can be used to perform the decontamination work while arbitrarily moving the master slave arm 11a.

For example, when the floor 1 has a shape in which the lower part of the article 4 to be decontaminated is open, the arm 8 extending and contracting from the bottom extends as shown in FIG. The decontamination jig is housed so that the high-pressure water supplied via it can be decontaminated.
The decontamination jig is housed in the nozzle pit 9 so as not to project above the floor 1 when it is not used. Decontamination water is collected in the nozzle pit 9 and the drain port 10
More discharged. The center of the decontamination nozzle 6 can be moved by the lower rotation mechanism 6a.

[Brief description of drawings]

FIG. 1 is a sectional view of a decontamination house according to a first embodiment of the present invention. FIG. 2 shows a second embodiment of the present invention, and FIG. 3 is a plan view of the same. In the figure: A ... Decontamination house 1 ... Floor (of decontamination house) 2 ... Side wall (consisting of bellows) 3 ... Ceiling 3a, 3a '... Upper running shutter 4 ... Decontamination object, 5 ... ... Telescopic arm 6 ... Decontamination nozzle, 6 '... High-pressure hose reel 6a ... Rotating mechanism, 7 ... Traverse shutter 7a ... Traverse shutter frame 8 ... Telescopic arm (of decontamination nozzle) 9 ... Nozzle Pit, 10 ... Drain port 11 ... Power manipulator 11a ... Master-slave arm 12 ... Arm insertion part 13 to 13 ... Shutter storage 14 to 14 ... Wiping device 15 ... (for decontamination nozzle) Hook 16 …… (for manipulator) Decontamination nozzle

Claims (2)

[Scope of utility model registration request] 1. A decontamination house for removing radioactive substances adhering to large-scale equipment in a nuclear facility, and a ceiling having an openable / closable opening for carrying a large-scale object to be decontaminated into the decontamination house. It is composed of a bellows-made side wall that can carry in the decontamination product, set it on the floor, and then extends upward to cover the decontamination product.The opening of the ceiling is closed to enable the decontamination house to be sealed. Telescopic decontamination house characterized by that. 2. A ceiling shutter is opened and closed by an upper traveling shutter mounted on both sides of a transverse shutter frame, and a transverse shutter which can be opened and closed in a direction orthogonal to the upper shutter in the transverse shutter frame. The telescopic decontamination house according to claim 1), characterized in that the center has a manipulator insertion port in its center, and the upper traveling shutter and the traverse shutter can freely move as the manipulator moves.