JPS58189598A - Device for decontaminating pool wall face of pwr type reactor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wall decontamination device d for a pressurized water reactor pool.

Conventional reactor pool wall decontamination machines use a method in which the machine is suspended from a hanging wire on an overhead lane installed in the reactor building, the position is determined by a crane, and then the decontamination machine is raised and lowered by a hoisting machine. That's what I'm saying.

According to this, during the work period, the only large overhead running lane in the building will be occupied, which will not only affect other work, but also be slow and require skilled operators. Become. Therefore, it is desirable to use a dedicated suspension trolley that is as light as possible.

In this case, in a pressurized water reactor pool, there are many obstacles on both sides of the floor, making a cantilever type bogie almost impossible. In addition, with a normal gantry crane, the obstacle placed on the center line of the pool (see Figure 1 a) is considerably higher than the floor level f, so it is not only large but also requires a large floor space for storage. This is a problem because it is difficult to implement.

This application aims to solve the above problems.The present invention is an invention in which the gate-type crane is modified, the support legs are made into a mountain shape to prevent it from hitting obstacles in the pool, and the area occupied when stored is reduced. The supporting legs can be opened and closed in the center.

In addition, in the past, the power supply panel, vacuum blower, demister, etc. were placed separately on the floor, and the connection hoses and wiring were complicated, making it difficult to work, but now all these devices are loaded on a crane trolley, and the hoses, Wiring is wound around a drum on a trolley, making the work easier and eliminating the need for disassembly at all during storage.As a result, the number of workers can be greatly reduced, and the work is much easier. Since the time can be shortened, the amount of radiation exposure can be reduced as much as possible.

Examples will be described below with reference to the drawings. Reference numeral 1 denotes a wall decontamination machine that decontaminates the pool wall W using a rotating brush 2. In the decontamination machine 1, the running wheels 6 run on the wall surface wi, but are prevented from leaving the wall surface by a vacuum suction device.

The decontamination machine 1 is suspended from support legs A having a chevron shape so as to be movable up and down.

The supporting legs A are made to be able to travel on the pool by means of two traveling carriages 4.4' which form a pair.

The traveling trolley 4 has a cross-sectional shape, and heavy wheels 5.6 are attached to one side of the L-shape to run on a floor surface f, and to the other side to travel on a wall surface W.

7.7 is a leg constituting a chevron-shaped support leg fixed on each truck 4, and is supported at the top by a leg opening/closing shaft fitting/hanging fitting 8 so as to be openable and closable. 9 is a decontamination machine hanging wire, which also integrally supports electrical wiring, water supply hose, exhaust hose, etc.

The hanging wire 9 is connected to the decontamination machine 1 from a winding drum 10.50 via a guide pulley 11 and a positioning pulley 12 which are swingably attached to the lower part of the hanging fitting 8.

As shown in FIG. 3, the positioning pulley 12
It is slidably attached to the support cart 16 so that the distance from the support cart 16 can be adjusted. 14 is a fastening device for sliding and positioning and then fixing.

The support truck 13 is equipped with a guide rail 15.15 mounted on the traveling truck 4.4 and wheels 16 that roll within the guide rail 15 connecting the two cars. Therefore, the chevron-shaped support leg A
It is possible to move to a wall perpendicular to the direction of travel, or even to the opposite wall. Reference numeral 17 denotes a fixing device for the support cart 13. When this device is turned, the support cart 13 is fixed against the guide rail 15.15.15.
can be fixed and positioned.

In addition to the winding drum 10.10, an operation panel/switch panel 18 and a motor 19 are loaded on the truck 4.4. A vacuum blower 20, a demister 21, and a motor 19 are mounted on the other truck 4.

As described above, the positioning pulley 12 can decontaminate all four circumferences of the pool, but the guide rails 15, 15'15 must also climb over the obstacle a in the center of the pool as the supporting legs A travel. For this reason, as shown in FIG. 5, a positioning pulley guide rail bouncing shaft fitting 22 is provided at the connecting portion between the left and right rails 15. As shown by the imaginary line, the guide rail 15 can be flipped up diagonally upward.

23 is a support metal fitting.

To store the support leg A, remove the wires, hoses, etc. from the positioning pulley 12 as shown in Fig. 7, hoist it to the center, and then flip up the leg 7.7 and the positioning pulley guide rail 15'' to fix it. , may be stored on the storage stand 24.

Because of the double-top configuration, even if there is a protruding obstacle in the center of the pool, it can be easily avoided and decontamination work can be carried out efficiently.

Further, since the supporting legs A can be folded at the upper part and stored in the storage platform, the required storage space is not a big problem.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view of a state in which support legs are used for decontamination. Figure 2 is also a plan view. FIG. 3 is a detailed sectional view of the vicinity of the traveling bogie. Figure 4 is a left side view of Figure 5. FIG. 5 is a partially enlarged view of the springing L portion of the guide rail. FIG. 6 is a plan view of FIG. 5. FIG. 7 shows the stored state. In the figure; A: Chevron-shaped support leg W: Wall Surface 1: Decontamination machine 2: Rotating brush 6: Running wheel
4.4 Traveling trolley 5.6 Wheels 7.7 Legs 8 Leg opening/closing shaft fitting and hanging fitting 9 Decontamination machine hanging wire 10.10 Winding drum 1
1 Guide pulley 12 Positioning m wheel 13
Support truck 14 Fastening device 17 (of the support truck) fixing device 18 Operation panel/switch panel 19.19 Motor 20 Vacuum blower 21 Demister 22 Positioning pulley guide rail bouncing shaft fitting 23 Support fitting 24 Storage platform layer L Applicant Nuclear Power Agency Co., Ltd. Patent Attorney Shichiohashi Isamu Figure 2 Figure 3 4 Figure 4

Claims (1)

[Claims] (11) A pair of running carts running on both sides of the water reactor pool are connected by a chevron-shaped support leg that can be opened and closed at the center of the top,
A decontamination device for a wall surface of a pressurized wooden reactor pool, characterized in that a decontamination machine is suspended from the support legs via a hanging wire. (2) A pair of running carts that run on both sides of the pressurized water reactor pool are connected by a chevron-shaped support leg that can be opened and closed at the center of the top.
The decontamination machine is suspended from the supporting legs, and the decontamination machine is suspended by a wire that is stretched through a positioning pulley that is guided by a guide rail on the running carriage and a guide rail installed between the running carriages. The traveling platform is placed at the required location on the wall, and the traveling platform booth section is made into a spring type with one end of the guide rail.