JPS62185196A - Treater for apparatus for exchanging fuel - 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 [Technical Field of the Invention] The present invention relates to a handling device for refueling equipment applied to a fast breeder reactor type nuclear reactor.

[Technical Background of the Invention 1 When performing fuel exchange work on a fast breeder nuclear reactor (hereinafter abbreviated as a nuclear reactor), the fuel exchange equipment that handles the core components and other equipment necessary for the fuel exchange work are removed from the nuclear reactor. Install through the shutoff plug installed at the top of the furnace vessel.

When a nuclear reactor is in operation, the fuel exchange equipment and other equipment are removed from the reactor interior, and a plug with a sealing mechanism is installed in its place.

Installation and removal of these fuel exchange devices, other equipment, and plugs are performed using a handling machine called a cask.

This cask is one of the fuel exchange equipment, part 11!2 plug, and equipment (hereinafter referred to as equipment).
It is not a good idea to provide each cask for each, but it is rational to handle several handling devices in one cask.

A conventional handling device for refueling equipment will be explained with reference to FIG.

In FIG. 6, reference numeral 1 partially shows a shield plug installed in the reactor vessel of a fast breeder reactor, and handling equipment having a long part 3a is inserted from the through hole 2 of the shield plug 1. 3 is put in and taken out. A handling equipment guide tube 4/J) is installed on the shield plug 1 to airtightly surround the through hole 2. A door valve 5 for handling equipment is attached to the upper end of the guide tube 4, a door valve 7 for a cask is attached to the door valve 5 via a connecting tube 6, and a cask body 8 is attached to the door valve 7. It is being A guide rail 9 is installed on the inner surface of the cask body 8, and a hoisting mechanism 12 is provided above the cask body 8. A gripper device 11 having a guide roller 10 is installed along the guide rail 9.
It is suspended by a wire 13, and can be raised and lowered by this hoisting mechanism 12. A claw 14 is connected to the lower part of the gripper device 11, and the handle cap 15 of the handling device 3 is gripped by the claw 14.

In the figure, reference numeral 16 denotes a sealing mechanism that seals between the handling equipment 3 and the door valve 5.

The equipment handled by this KiV-Sk has different shapes, the necessity of orientation during installation, and the installation of the equipment (; It has problems.

FIGS. 6 to 9 show the use and insertion work of various handling devices using the Gitsk.

FIGS. 6 and 7 are diagrams in the case where the equipment 3 to be handled is large, the installation position is high, and the installation direction is determined by a cask. In order to adjust the installation height of the handling equipment 3, a guide tube 4 is connected to the top of the shield plug 1, and after roughly placing the handling equipment 3 on top of it, the handling equipment 3 is inserted into the reactor from the through hole 2 of the shield plug 1. A door valve 5 is installed to prevent radioactive gas from escaping.

Furthermore, a connecting tube 6 is attached to the above-mentioned door valve 5 for installing the cask body 8 at a predetermined height. A cask door valve 7 is installed to prevent the contained radioactive gas from leaking to the outside. In addition, the handling equipment 3 is held inside the cask body 8,
A gripper device 11 equipped with gripper claws 14 for installation and removal is housed, and a hoisting machine @ for vertically moving the gripper device 11 and handling equipment 3 is housed at the top of the cask body 8.
There are 12.

Pull the handling equipment 3 (tomogi installs the cask body 8 as described above, and operates the valve of the casting door valve 7 while operating the horizontal 12 and the kite rail and the idle roller 1.
When the gripper device 11, which has been oriented in accordance with 1 grips the handling cap 15 provided on the top of the handling equipment 3, and the handling equipment 3 and the gripper device 11 are lifted up again by the operation of the hoisting mechanism 12 (Fig. 7), and the handling equipment 3
handling is completed. Loading of the handling equipment 3 into the furnace is also carried out by the reverse procedure of the above procedure.

However, as shown in FIGS. 8 and 9, when the handling device 11 is small, installed at a low position, and the inner diameter of the guide tube 14 is small, the above-mentioned gripper device 11 cannot handle it. The top of the device 11 cannot be reached. Therefore, it was necessary to replace the gripper device 11 with a smaller gripper device that can pass through the inner diameter of the guide tube 4, or to attach a smaller gripper via an adapter. Therefore, in order to handle various types of handling equipment 3, it is necessary to replace the gripper devices 11 with gripper devices 11 suitable for each handling device 3, and a place for storing the gripper devices 11 is required.

In addition, when the gripper device 1 passes through the narrow guide tube 3, since there is no guide rail 9 mentioned above, the cask body 8 and the cask door valve 7 are installed at the top of the reactor in order to hang the gripper device 11 vertically. At the time of the installation, it was necessary to install the reactor with high precision, which increased the time needed to replace the fuel, which in turn led to a decrease in the operating rate of the reactor and an increase in the amount of material needed.

[Objective of the Invention 1] The present invention has been made in view of the above-mentioned problems, and it eliminates the need for loading handling equipment in preparation for nuclear reactor fuel exchange work or at the end of work, or for replacing the gripper device after tomorrow. An object of the present invention is to provide a fuel exchanger handling device that does not impede the performance of the equipment.

[Summary of the Invention] The present invention relates to a guide tube and a door valve for handling equipment and a door valve for a cask, which are sequentially erected on a barrier plug that closes a reactor vessel of a fast breeder reactor, and a cask body which is erected on the door valve. and a fixing guide rail laid along the axial direction on the inner surface of this cask body, and a guide roller that moves up and down along this fixing guide rail,
A guide housing having this guide roller on the side,
A key groove provided on the inner surface of the guide housing and a plurality of vertically movable moving parts (A It is equipped with a telescoping guide rail on the right side, and a gripper body having a key on the side that abuts on the locking part of the telescoping guide rail, suspended from above by a hoist structure, and having gripper claws at the bottom. [j1 symptom.

[Embodiments of the Invention] Hereinafter, an embodiment of a handling device for refueling equipment according to the present invention will be described with reference to FIGS. 1 to 3.

In FIG. 1, the same parts as in FIG. 6 are indicated by the same reference numerals, and the explanation of the assembled parts will be omitted. FIG. 2 shows an enlarged view of the gripper device shown in FIG. 1, and FIG. 3 shows the gripper device shown in FIG.
It is a sectional view taken along arrow A.

The difference between the present invention in FIG. 1 and the conventional example shown in FIG. 6 is in the gripper device, so the explanation will be mainly based on FIGS. 2 and 3.

That is, a fixing guide rail 9 is laid along the axial direction on the inner surface of the cask body 8 in FIG. 1, and the gripper device 20 moves up and down along this guide rail 9.
is suspended by the hoisting mechanism 12 by the wire r13. This gripper device 20 has a guide roller 10 attached to the side surface for determining the orientation when loading the handling equipment 3, and is configured to move along a guide rail 9 inside the cask body 8.

The gripper device 20 also has gripper claws 21 at the bottom as shown in FIG. 2, and the gripper body 22 is held in the center by a gripper body 22 that opens and opens the gripper claws 21, a guide rail 9, and a guide roller 10. The guide includes a gripper 23 and a telescoping guide rail 24 that connects the gripper body 22 and the guide housing 23 so that they can move axially but are restricted from rotating.

This guide rail 24 includes the first moving portion 1-A 24a,
It consists of a second moving member 24b1 and a third moving member 24c, and these members are sequentially aged. A key 25 is provided on the upper outer periphery of the gripper body 22, and this key 25 engages with a recess in the innermost third moving member 24c of the telescoping guide rail 24. In this telescopic guide rail 24, each member 24a, 24b, 24c has a concave joining part as shown in FIG. It engages with the groove 26 to determine the orientation of the guide housing 23 and the gripper body 22.

As described above, the telescopic guide rail 24 has a three-stage structure having three moving members 24a, 24b, and 24G, and is held by the shoulder 27 at the bottom of the gripper body 22 so as not to fall. The bales are held in place by a presser metal fitting 28.

A stopper 29 is installed on the cask body 2 to hold the guide housing 23 when the gripper body 22 and some telescopic guide rails 24 are lowered into the dexterous guide tube 4 for handling small diameters.

The tip shape of the gripper body 8, the gripper claws 21, and the handling claws 15 of each handling Ia device are aligned in advance so that they can be handled in a single handling operation.

Next, the present invention will be explained in detail.

Figure 1 shows the handling condition when the handling equipment 3 is large and the installation position is high.
The handling conditions are shown when the installation position is low.

When the handling equipment 3 is large, the gripper device of the present invention
It performs the same operation as the gripper device shown in the figure.

At this time, in the gripper device 20, the gripper body 22 and the tunoid housing 23 are not separated and remain integral.

Next, if the handling equipment is small, in this case the gripper device 20 used in the invention operates as follows.

In handling, as shown in FIG. 5, a key/socket main body 8 having a built-in connecting tube 6 and a gripper device 20 is installed on the L side of the handy door valve 5. Then, the door valve 12 is heard, and the gripper device 20 is moved to the cask body 8 by the operation of the hoisting mechanism 12.
It heals and descends on the guide rail 9 provided inside. When the gripper device 20 contacts the stopper 29 provided at the bottom of the connecting tube 6, the gripper device 20 separates into the gripper body 22 and the tonoid housing 23, only the gripper body 22 descends, and the guide housing 23 moves into the connecting tube. Remains within 6. Further, a cable 13 is connected separately to the upper part of the gripper body 22, which suspends the gripper device 20 from the hoisting hole side 12. The separated gripper body 22 is attached to the key groove 26 of the kite housing 23 at the outermost side.
The measuring device 3 is guided by a telescopic guide rail 24 whose rotation is restrained by a telescopic guide rail 24, passes through the handling equipment door valve 5, reaches the handling equipment 3, and handles the meter 3 by gripping the handling cap 15 with the gripper claws 21. When rising, the gripper body 2 is again guided by the telescopic guide rail 24.
2. When descending, the guide housing 23 engages with the inner diameter of the guide housing 23 which is limited by the stopper 29 and is waiting, and the handling equipment 3 that moves up inside the cask body 8 and is gripped by the gripper body 22 is stored in the cask body 8. .

[Effects of the Invention] The present invention divides a gripper device into a gripper body and a guide housing, allows these to be separated in the axial direction, and connects a cable to the gripper body for lifting and holding gripper claws for handling equipment. By installing it on the side, it is configured so that a single gripper can handle various types of fuel exchange equipment that rotate at multiple levels. Therefore, according to the present invention, it is not necessary to replace the gripper device during the quasi-leakage work a> in the fuel exchange and at the end of the fuel exchange, and it is possible to shorten the work time.

In addition, by connecting a plurality of movable members that can be freely expanded and contracted in the axial direction between the gripper body and the guide housing, and restraining the rotational movement using a kite rail with an engagement groove, a predetermined position can be achieved during installation. Items that require the same orientation are stored in the cask in a predetermined orientation, making it easy to manage them.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view partially showing a side view of an embodiment of a handling device for refueling equipment according to the present invention, and FIG. 2 is an enlarged view of the main part of FIG. 1. 3 is a cross-sectional view of the main part of FIG. 2 seen from above, FIG. 4 is a cross-sectional view showing another embodiment of the present invention, and FIG. 5 is a cross-sectional view of FIG. 4. Fig. 6 is a longitudinal cross-sectional view showing an example of a conventional device; Fig. 7 is a longitudinal cross-sectional view showing the device in Fig. 6 with the handling equipment lifted; FIG. 8 is a V vertical sectional view showing another conventional example, and FIG. ......Shiyahei plug 2...Through hole 3...Equipment handled 4...Equipment handled Guide cylinder 5...
...Door valve for handling equipment 6...Connection pipe 7...Door valve for cask 8...
..... Cask body 9 ..... Guide rail 10 ..... Guide roller 11 ..... Gripper device 12 ..... ...Hoisting machine groove 13...Wire 14...Claw 15...Handling cap 16...
......Seal mechanism 20...Gripper device 21...Gripper claws 22...Gripper body 23... ...Guide housing 24...
...Extendable guide rail 25...
Key 26...Key groove 27...Shoulder part 28...Press fitting 29...Slip head Agent Patent Attorney Nori Ken Chika Hirofumi MitsumataFigure 1Figure 2Figure 3Figure 4Figure 5Figure 6Figure 7Figure 8Figure 9

Claims (1)

[Claims] A guide tube for handling equipment, a door valve, and a door valve for the cask are installed in sequence on a shield plug that closes the reactor vessel of a fast breeder reactor, a cask body is installed upright on the door valve, and a shaft is installed on the inner surface of the cask body. A fixing guide rail laid along the direction, a guide roller that moves up and down along the fixing guide rail, a guide housing having the guide roller on the side surface, and a key groove provided on the inner surface of the guide housing. , a telescoping guide rail having a plurality of vertically movable movable members that move up and down along the keyway and are provided with locking portions at both ends to engage and connect with each other; 1. A handling device for fuel exchange equipment, comprising: a gripper body having a key on the side surface that abuts on a stop part, lifted from above by a hoisting mechanism, and having gripper claws at the bottom.