JPS5977389A - Fuel channel handling tool - 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 fuel channel handling tool, and more particularly, to a fuel channel handling tool.
Attachment/detaching of Brennel and movement/storage of fuel storage racks)

[Technical Background of the Invention] Nuclear Reactor The fuel assembly installed in the reactor core becomes a spent fuel assembly after long-term use.

Conventionally, in preparation for cutting and transporting the corners 1q3 of a spent fuel assembly, the fuel assembly is separated into a fuel bundle and a fuel brennel, and each is stored separately in a spent fuel storage rack. is shown in line 4).

A conventional fuel channel handling tool 1 is constructed as shown in FIG.

As a guide when covering the top of the fuel channel 2, there is a guide 4 that is fixed to the side of the frame 3 and uses the opposite corners on the outside of the fuel channel 2, and a clip on the top of the fuel channel 2. 5, a stopper 6 for positioning in the height direction, a claw 7 that hooks onto the lower surface of the clip 5 on the upper surface of the fuel tunnel 2, and two pieces to which this claw 7 is fixed. The arm 8 and the first arm 8, which is the center of rotation of the arm 8 and which is fixed to the 71 nome 3.
The second pin 12, which is fixed to the movable link '10 through the elongated hole 11 of the arm 8, and the movable link 10, which is fixed to the movable link '10, is movable. A shaft 13 for operating the link 10, a knob 14 at the tip of this sill 771, 13, a handle 15 for hanging the entire handling tool, a support plate 16 for connecting the handle 15 and the frame 3z1, It is composed of a vibrator 17 and a stop block 18.

During this work, C-C completed the work as shown in Figure 2.

First, the reactor core (not shown) is installed on the wall of the fuel tank 1 boule 20 and is placed on the reactor base 23, which can be freely lowered, of the fuel tank attachment/detachment machine 22 located below the cooling water 21 surface. ) J: Place the spent fuel assembly 24 taken out.

The fuel assembly 24 includes a fuel bundle and a fuel bundle 2.
It consists of

Next, from above the fuel exchange floor surface 25, using the outer corner of the fuel exchange floor 25, guide 4 shown in FIG.
guide the fuel tank 1 and lower it until the collar 6 hits the soil surface of the fuel tunnel 2.

Thereafter, the knob 14 is manually rotated in the direction in which the claw 7 is opened, and the claw 7 is hooked onto the lower surface of the clip 5 of the fuel channel 2, so that the fuel channel 2 is in a gripping state.

This simple stop bar 18 is held in a V tunnel handling tool boulder 26 installed in advance at the center of the fuel assembly.

After completion, when the movable base 23 is lowered, the fuel bundle descends together with the movable base 7 due to its own weight, and the fuel bundle 2G catches on the claw 7, leaving the fuel bundle in the state of It remains.

Further, the remaining fuel channels 2 are temporarily stored in a temporary channel storage rack 27 installed on the wall inside the fuel sol 20.

Note that the reference numeral 28 in the figure indicates the upper handle of the fuel bundle in the two spent fuel storage ranks.

1. Problems with the fuel tunnel technology] As described above, with the conventional ft tunnel handling tool, the operation of grasping the fuel tunnel 2 is done manually, which takes a lot of time (). When holding and leaking the fuel to the storage rack 28, the total length of the fuel channel 2 is 1-
1, the penetration depth of the spent fuel storage rack 11 is L2, and 1. ．． 1. Because of the relationship between 1 and 2, the fuel channel 2 is used for extinguishing rice. , the guide 4 is obstructed and cannot be handled.: The used fuel tank 27, which is used for temporary storage, is moved from the storage rack 27 to the storage rack 28. There is the inconvenience of not being able to do this.) 1., :.

Purpose 1 of the invention The present invention was made based on the circumstances described in 1. The first purpose is to cover the fuel channel so that the claw can be opened and closed quickly by diastal operation. 2 can be handled quickly, and radiation exposure during work H can be reduced.

By having a guide at the inner corner of the 21st fuel channel 2 and a guide at the inner corner, the fuel channel 2 can be moved and stored from the tunnel storage rack 27 to the used paddy storage and cutting rack 28. There is a particular thing.

[Summary of the Invention] That is, the present invention provides a guide that is fixed to a frame and a side plate and guides opposing corners without clips inside the fuel channel as a guide when covering the upper surface of a fuel channel of a fuel assembly. The clip 1 on the top surface of the fuel ff+1 channel is connected to the clip 4/I for positioning in the height direction, and the hook that hooks onto the bottom surface of the clip on the top surface of the fuel channel 11. A fixed arm, a movable link connecting this 7-in as a pair, a first pin serving as the rotation center of the arm, and a first pin that passes through the elongated hole of the arm and is fixed to the movable link. a cylinder for operating the movable link, a frame supporting the cylinder, a channel for supplying power to the cylinder, a plug connector and a socket; This fuel bouquet handling tool is characterized by being equipped with a connector, a handle that hangs the entire handling tool, and a vibrator that connects the frame 42.

Therefore, the claw can be opened and closed by remote control using the above-mentioned cylinder, and the guide using the inside of the fuel tunnel 2 allows the fuel to be removed! The fuel channel 2 is quickly moved to the fuel storage rack 11 for storage.

[Embodiment 1 of Defense] Hereinafter, the details of an embodiment of the present invention shown in FIG. 3 and subsequent figures will be explained.

At the lower end of the J3 C1 fuel channel handling shell 30 shown in FIG. 33 and FIG. is attached (pull), and this guide 31 is fixed to a frame 32 and a lead plate 33.

Furthermore, the collars 1 to 3/l are attached to the clips 5 on the upper surface of the fuel cylinder 2 for positioning in the height direction, and the collars 34 are attached to the first cover plate 35 and the side plate 1. It is fixed to the bottom surface of the

The upper end of the first cover plate 35 is fixed to the frame 32.

In addition, a claw 36 hooked onto the lower surface of the clip 5 on the upper surface of the fuel channel 2 is fixed to two arms 37, and
37 performs C opening/closing with the first bin 38 as the center of rotation.

The two arms 37 are connected as a pair by a movable link 39.The two arms 37 are connected as a pair by a movable link 39. There is.

In addition, the moving link 39 is a shirt l of one Noah cylinder 42.
- The arm 37 is opened and closed by inserting and removing the I/O.

Further, the arm 37 is in the closed position and the bundle '1 is burned.
In order to avoid interference with the handle 29, the joint of both arms 37 is cut out, and the arm 37 is closed ++,
' A projection is provided at the joint (J. [1) of both arms 37 to act as a stopper for J.

In addition, the soil cylinder 42 is attached to the frame 32 with a pressure of 1-/l.
J3 is fixed with /l, and in addition, for air pressure supply, there is a connector 45 plug connector 46 and a socket = 1.
The connector 47 is connected to the fuel exchange floor 25 shown in FIG.
guided to the air source above.

Note that the plug connector 4G and the socket/connector/17 are fixed to the second cover plate 1-48.

A second cover plate 48 is fixed to the frame 32.

There is a handle 49'c on the top of the holder 32 that serves as a hanging shell for the wooden handling tool body, a frame 32, and a pipe! 50, stop 11 cock 52, support plate 51, handle 4
They are connected in the order of 9.

The operation of the handling tool of the present invention for implanting sea urchins as described above is as follows.

First, as shown in FIG. 2, after the fuel assembly is placed on the movable base 23 of the fuel channel attachment/detachment machine 22, this handling tool is supported so that it can be freely descended from the upper blade of the fuel boule 20, and it is gradually moved up to the fuel channel 21 surface.・Ge”C Igi, Guide to this handling tool 3
While being guided into the fuel tunnel 2, the person is guided inside the fuel tunnel 2.

As it is further lowered, the stopper 3/l comes into contact with the upper surface of the clip 5 of the fuel channel 2, and positioning in the height direction is automatically performed.

Next, the opening operation of the claw 36 will be explained. 1 Plug connector 4 connected to an air source on the burn exchange floor 25
When air pressure is applied to the air cylinder 42 from 6, the shaft 4
3 is pushed out, and the moving link 39 connected to the tip of the shaft 43 is lowered.

At this time, exhaust air is discharged from the socket 1-connector 47 side t.

When the movable link 39 is lowered, the left and right arms 37 are pushed down by the first bin 41 fixed to the movable link 39, and the first bin 38 is rotated around the axis of rotation and moved in opposite directions. Rotate once.

This rotation of the arm 37 causes the claw 36 at the lower end of the J, S, AR\ 37 to perform a closing operation, and the claw 36 is pulled onto one side of the clip 5 of the fuel channel 2.

J Sue 1-, j, su, mo 11 boo + 7 channel 2]~ ends.

At this time, the valve 1.1 handle holder 26, which has been installed in advance at the center of the fuel assembly, is held by the valve 1.1 handle holder 26.

After completion, move the movable base 23 of the fuel V7 channel attachment/detachment 1M 22
3 (as you go, fuel channel 2 will be pulled by this handling tool).
1 tank, fuel r [separated from the bundle, fuel channel 2
The extraction work has been completed.

Next, the fuel tank 7 channel 2 is attached to the spent fuel storage rack 28.
In order to store the fuel in the used fuel storage rack 28, the fuel channel 2 is suspended from this handling tool.
After moving and positioning use bay fuel T1 storage rack 28
Storage layer inside.

Next, the claw 3G is closed, and the fuel chitunnel 2 is released from the main handling tool.

The closing operation of the claw 36 will be explained.

That is, when air pressure is applied to the air cylinder 42 from the socket connector 47 connected to the air source on the fuel exchange floor surface 25, the cylinder 43 is retracted into the cylinder 1771, and the cylinder 43 is retracted into the cylinder 1771. Foot/1.3
The moving link 39 connected to the tip of increases by -1.

At this time, the plug connector 47 side is exhausted.

When the movable link 39 is raised, the left and right arms 37 are pulled up by the second pin 41 fixed to the movable link 39 and rotated in opposite directions with the first pin 38 as the rotation axis. .

This rotation of the arm 37 causes the claw 36 at the lower end of the arm 37 to perform a closing operation, and the claw 36 is removed from the tenth surface of the clip 5 of the fuel dillener 2.

With the above steps, a series of operations for handling the fuel dilennel 2 is completed.

"Effects of the Invention" Hereinafter, as is clear from the explanation of [, the fuel of the present invention]
First, the C-claw 3 is used remotely by pneumatic pressure.
C can be opened and closed, reducing the risk of radiation exposure for workers, and allowing work to be carried out quickly and reliably without being affected by ripples on the water surface or reflection of light.

Second, by using the inside of the fuel F1 tunnel 2 as a guide, it becomes possible to store the fuel tunnel 2 directly in the used fuel rack 28, and the fuel channel 2 of the fuel 1□'p tunnel IXJI22, J: Arrival JB2
The work of moving and storing the spent fuel 111 to the storage rack 28 can be carried out using the same handling tool, which saves labor and reduces work time to 0, which is very effective. .

[Brief explanation of drawings]

Figure 11 shows some of the conventional fuel tank handling equipment.
Figure 11 shows a hemostasis diagram, Figure 2 is a cross-sectional view of the fuel pool,
Fig. 3 is a front view partially showing an embodiment of the fuel tunnel handling tool according to the present invention in plane 1111, and Fig. 4 is a -1 of Fig. 3.
・This is a rear view looking up from the side. 2......More J'l Chit-Nel 4...
・・・・・・Guide 5・・・・・・Clip 6・・・・・・S 1-Brim 7・・・・・・Claw 8・・・・・・... Arm 14 ......) Bu 20 ...... Combustion 1 Boul 22 ...... Fuel channel handling equipment Df2
Machine 27...... Dijp tunnel storage rack 28
......Spent fuel storage shoes outside 31...
...Guide 34...Stopper 36...Claw 37...Arm 42... 1 Asylinda Patent Attorney Satoshi Suyama - Figure 3 30 Figure 4

Claims (1)

[Claims] (1) A guide when placing the fuel assembly over the top surface of the fuel tunnel is defined by μm on the frame and side plate, and the guide is an angular part of the inner side of the fuel tunnel where there is no opposing groove. A stopper for positioning the fuel channel in the height direction by applying it to the clip on the top surface of the fuel channel, a tab that can be pulled to the bottom surface of the clip on the negative side of the fuel channel, and this tab is fixed. an arm, a movable link connecting the arms as a pair, a first pin located at the center of rotation of the arm, a second pin fixed to the 88 link passing through the length of the arm; 1. A cylinder for avoiding movement of a moving tank;
A frame that supports this cylinder, a tube that supplies a power source to the cylinder, a Bragni connector, a socket connector, a pipe that connects the handle of the entire handling tool and the frame 42. A fuel channel handling tool characterized by comprising: