JPS6244396Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a control tube for an irradiation test capsule in a nuclear experimental reactor.

The irradiation test capsule (hereinafter referred to as "capsule") of a nuclear experimental reactor contains, in addition to fuel, multiple electric wires for testing (for example, these wires are used for controlling thermocouples, strain meters, solenoid valves, etc. and for signal transmission). ) and multiple metal pipes (these pipes are used for cooling water supply and drainage, gas replacement, and valve operation). In order to communicate with the outside while the capsule is installed in the pressure vessel of the experimental reactor, the electric wires and pipes are combined into one control tube, and the tube is configured to be pulled out from the upper end of the capsule. . Therefore, when replacing the capsule, the control tube may come into contact with other objects in the water tank containing the pressure vessel or other capsules in the capsule storage device installed in the water tank, causing malfunction or damage. There is a risk of inviting Therefore, when replacing the capsule, etc., the route for moving the capsule and control tube between the pressure vessel and the capsule storage device is fixed, and the control tube is flexible even when stored in the capsule storage device. There was a desire to maintain the same shape without changing the shape in the space in which it is used.

This idea was made in view of the above circumstances, and provides a control tube for an irradiation test capsule in a nuclear experimental reactor that can always maintain the same shape, can move along the same trajectory, and can be maintained in a minimum space. The purpose is to

An embodiment of this invention will be described below with reference to the drawings.

Figures 1 and 2 are a configuration explanatory diagram and a plan view showing a capsule moving device for irradiation tests of an experimental nuclear reactor.The experimental nuclear reactor 1 is placed in a pressure vessel 3 in a water tank 2 to block radiation. be done. Reference numeral 4 denotes a capsule, and this capsule 4 is made up of not only fuel but also electric wires for controlling the conditions within the experimental reactor 1 and transmitting data, cooling water, metal pipes for transmitting helium gas, and the like. A joint 6 is attached near the upper end of this capsule 4, and this joint 6
One end of the control tube 5 whose details are shown in FIG. There is. Note that the other end of the tube 5 is connected to a measuring device, a supply device for water, gas, etc., which are not shown. 7 is a gripper, and this gripper 7 is a capsule 4.
It has a structure in which the upper end can be grasped, and its attachment and detachment are automatically performed by electric power. The gripper 7 is fixed to the lower end of the operating rod 8. Reference numeral 9 denotes a crane, and this crane 9 is connected so as to be able to move back and forth and left and right above the water tank 2, and an electric motor 91 is disposed at the lower end of the crane 9. The driving force of this electric motor 91 is transmitted to the arm section 93 via pulleys 92, 92 provided at the upper part of the crane 9. The arm portion 93 is moved up and down along the guide rod 94. A detachable portion 95 of the operating rod 8 is fixed to the protruding end of the arm portion 93. 10 is a capsule storage device, and this device 10 is fixed to the wall 21 of the aquarium 2, and the capsule 4 is
It is equipped with a storage container 101 that can store books one by one. In the figure, numerals 12 and 13 are position detectors, and numeral 31 is a capsule storage tube provided inside the pressure vessel 3. 33 and 34 are horizontal and vertical rails.

The control tube 5, as shown in FIG.
A plurality of wire bundles 51, a member 52 such as a tape or string that integrates the wire bundles 51, and this member 5.
Right-hand winding (S winding) or left-hand winding (Z winding) on the outer periphery of 2.
It is composed of a plurality of metal pipes 53 wound around each other, and a tube-shaped protection member 54 that covers the metal pipes 53. The electric wire bundle 51 may be made by bundling the wires straight or by twisting the wires and then bundling them. In addition, metal pipe 53
is made of an elastic material, and the pipe is spirally wound in an S or Z winding around the necessary rod using a pressure roller, etc., and stretched in the axial direction while maintaining the spiral shape to form the wire bundle. 51 , that is, the member 52 .

A twist is given to the control tube 5 configured as described above. In the storage device 10, the twist of the tube 5 is controlled by the control tube 5, which is stored at a location on the right side toward the center of the aquarium 2, and the control tube 5 is stored at a location on the left side. The control tube 5 is given a left-hand twist. By giving the tube 5 a right and left twist in this manner, it is possible to prevent the tubes 5 from coming into contact with each other as described later.

Next, the replacement work of the capsule 4 will be described.
First, the crane 9 is moved onto the capsule storage pipe 31 of the pressure vessel 3, and the arm 93 holding the operating rod 8 is lowered. When lowering, the position detectors 12 and 13 determine the lowering position of the arm 93, and the upper end of the capsule 4 is gripped by the gripper 7 provided on the operating rod 8. After grasping the capsule 4, the arm 93 is raised, the capsule 4 is pulled out from the pressure vessel 3, the capsule 4 is moved onto the storage device 10 by the crane 9, and the arm 93 is lowered.
After storing the capsule 4 in the storage container 101, the capsule 4 is removed from the gripper 7. Incidentally, in order to take out a new capsule 4 from the storage device 10, the above-described operation is performed in reverse and the new capsule 4 is stored in the capsule storage pipe 31.

Even when the capsule 4 is moved from the storage device 10 to the capsule storage tube 31 as described above, the control tube 5 is twisted as described above in the storage state of the capsule 4, so that the capsule 4 is moved from the storage device 10 to the capsule storage tube 31. Capsule storage tube 31
When the control tube 5 is stored in the
This tube becomes untwisted. However, when the capsule 4 is stored in the storage device 10 again, the control tube 5 is pulled by the tension of the twist, so the tube 5 returns to the storage device 10 while always tracing the same trajectory. Furthermore, the tube 5 is always stored in a twisted state, and the stored state is always the same shape and position. The control tube 5 is restored in this way because the metal pipe 53 inside the tube 5 is spirally wound around the outer periphery of the wire bundle 51, so that a repulsive force that tries to restore the pipe 53 is constantly applied. It is from. Therefore, when the capsule 4 is stored in the storage device 10, the repulsive force of the metal pipe 53 is set so that the control tube 5 has the smallest shape so as not to interfere with other utensils.

The above explanation deals with the case where there is one control tube 5, but if there are multiple control tubes, for example two, the control tube 5 can be twisted clockwise and counterclockwise to insert and remove the capsule 4. Don't be a nuisance. In FIG. 2, 5a is a control tube twisted to the right, and 5b is a control tube twisted to the right.The tube 5a has a pipe 53 wound around the outer periphery of the wire bundle 51 in an S-wound. For the tube 5b, a pipe 53 is wound around the outer periphery of the wire bundle 51 in a Z-wound.

Although FIG. 3 shows the metal pipe 53 wound in a Z direction, it may be wound in an S direction.

As described above, according to this invention, an elastic metal pipe is spirally wound around the outer periphery of the wire bundle in a right-handed or left-handed manner, and the outer periphery is covered with a protective member to form a tube. Since the tube can be twisted in a rolled or left-handed manner, the repulsive force of the metal pipe allows the tube to be kept in a smaller shape when stored, and even when the tube is moved, it always moves along the same trajectory, so it does not cause any obstruction to other equipment. It has various effects, such as preventing it from becoming a problem.

[Brief explanation of the drawing]

1 and 2 are a schematic explanatory view and a plan view showing a capsule moving device for irradiation testing of a nuclear experimental reactor in which an embodiment of this invention is used, and FIG. 3 is a perspective view showing an embodiment of this invention. It is. 4... Capsule, 5... Control tube, 9
... Crane, 10 ... Storage device, 51 ... Wire bundle, 52 ... Member, 53 ... Metal pipe, 54
...protective member.

Claims (1)

[Scope of utility model registration request] In a device that moves the irradiation test capsule of an experimental nuclear reactor between its storage device and the pressure vessel in which the experimental reactor is housed, multiple elastic metal pipes are spirally wound to the right around the outer periphery of the wire bundle. Alternatively, a control tube for a capsule for irradiation testing of a nuclear experimental reactor, characterized in that it is wound counterclockwise, its outer periphery is covered with a protective member, and one end is connected and fixed to the capsule.