JPS6341040B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a storage device for a self-propelled inspection vehicle equipped with various measuring instruments provided in a containment vessel of a nuclear reactor.

(Prior Art) Generally, a containment vessel of a nuclear reactor in a nuclear power plant includes a pressure vessel, a water supply pipe connected to the pressure vessel, a main steam pipe, and various control equipment.

In addition, the inside of the containment vessel is kept airtight not only during normal operation but also after an accident occurs, since accidents such as coolant leakage and release of radioactivity are predicted.

On the other hand, since various piping such as the water supply pipe and the main steam pipe, valve devices, and various control equipment are installed inside the containment vessel, inspections are required during normal operation and when an accident occurs.

(Problems to be Solved by the Invention) However, since it is predicted that the radiation dose and temperature will be high inside the containment vessel, an inspector may enter the containment vessel to detect leakage of cooling water.
It is difficult to directly inspect radioactivity leakage, temperature, atmospheric pressure, etc.

Therefore, although a system has been developed in which an unmanned inspection device is installed inside the containment vessel and the information collected by this inspection device can be inspected externally (outside the containment vessel), As for the environmental conditions, the temperature may become high, and the inspection device itself is expected to become radioactive, so it is not desirable to leave it in the containment vessel.

In view of the above-mentioned points, the present invention aims to prevent the harmful effects of radioactivity and temperature rise in the inspection vehicle, improve the reliability and safety of various inspection equipment incorporated in the inspection vehicle, and at the same time, The present invention provides a nuclear reactor inspection vehicle storage device whose purpose is to enable maintenance and inspection even while the reactor is in operation.

[Structure of the invention]

(Means for Solving the Problems and Their Effects) The present invention provides an airtight hangar equipped with a main rail in a part of the shielding wall of the containment vessel, and provides respective opening/closing doors on the front and side surfaces of this airtight hangar, A drive carriage is installed perpendicular to the above-mentioned main rail, a movable rail equipped with a rack is installed on each guide roller of this drive carriage so that it can run freely, a self-propelled inspection vehicle is arranged on this movable rail, and this movable The rails are selectively joined and connected to each of the fixed rails laid within the shielding wall using the easily engaged pinion, and the inspection vehicle is stored in the airtight hangar, and the inspection vehicle is It is designed to prevent harmful effects caused by radiation and temperature rise, and to improve the reliability and safety of various inspection equipment.

(Example) Hereinafter, the present invention will be described with reference to an illustrated example.

In FIGS. 1 to 3, reference numeral 1 denotes a sealed containment vessel in a nuclear reactor, and inside this containment vessel 1, a concrete shield 2 having a cylindrical shape with a bottom is provided. A pressure vessel 3 equipped with a fuel assembly and control rods is installed in the upper part of the shield 2. In addition, this pressure vessel 3
It is assumed that a cooling water supply pipe and a main steam pipe (none of which are shown) are installed.

On the other hand, a part of the shielding wall 1a of the containment vessel 1 is provided with an airtight hangar 4, as shown in FIG. , 6 are hinged so that they can be opened and closed.

Also, when this opening/closing door 5 closes, other opening/closing doors 6
The door is always opened, so that the inside of the containment vessel 1 is kept airtight at all times. Further, each entrance/exit 4a, 4b of the airtight hangar 4 where each of the opening/closing doors 5, 6 is located
An outer fixed rail 7 and a plurality of inner fixed rails 8, 8', 8'' are installed approximately horizontally near the , and each end of each inner fixed rail 8, 8', 8'' is , is adapted to be selectively joined and connected to a movable rail 17, which will be described later.

On the other hand, in the storage chamber 9 of the airtight hangar 4, a main rail 10 is provided parallel to the center direction of the storage vessel 1, and this main rail 10 has a second
As shown in the drawings and FIG. 3, drive carts 11 are suspended orthogonally so as to be freely movable. In other words, this drive truck 11 is constructed of an underframe 1 on which a drive device 12 is installed.
Each connecting rod 14 is rotatably mounted on the connecting rod 14, and each rolling roller 15 is provided on the upper part of this connecting rod 14, so that each rolling roller 15 can roll on the main rail 10. It is something. Further, inside the underframe 13, a pair of guide rollers 16 at the front and rear are mounted, and on each guide roller 16,
A movable rail 17 having an I-shaped cross section is attached to the underframe 1.
It is provided so that it can run and move along the length direction of 3. Furthermore, a rack 18 is substantially integrally provided on the upper surface of the movable rail 17, and this rack 18 is adapted to mesh with a pinion 19 mounted on the output shaft 12a of the drive device 12. ing. Furthermore, the movable rail 17
A self-propelled inspection vehicle 20 is provided at the bottom of the vehicle so that it can run, and this inspection vehicle 20 has movable rails 17 connected to the inner fixed rails 8, 8',
8'', when the self-propelled inspection vehicle 20 is connected to each of the fixed rails 8, 8',
It is designed to be able to run over 8".

Note that the self-propelled inspection vehicle 20 includes, for example,
A TV camera, a thermometer, a dosimeter, a barometer, and other measuring instruments are built in, and the inspection vehicle 20 moves inside the containment vessel 1 while traveling on any of the inner fixed rails 8, 8', and 8''. In addition, when the self-propelled inspection vehicle 20 moves out of the airtight hangar 4 through the front opening/closing door 6, it moves the underframe 13 around the connecting rod 14. The inspection vehicle 20 can be rotated approximately 90 degrees to change the direction of the inspection vehicle 20, and then run on the floor to move outside the warehouse, so the inspection vehicle 20 can be moved to the fixed rail 7. .

Therefore, when inspecting the inside of the containment vessel 1, the door 6 of the airtight hangar 4 is opened as shown by the chain line. Next, when the drive device 12 is driven, the output shaft 1 of this drive device 12
As the pinion 19, which is integral with the pinion 2a, rotates, the movable rail 17, which is integral with the rack 18 and meshed with the pinion 19, is guided by the guide rollers 16 and joins, for example, to the inner fixed rail 8'. Then,
The inspection vehicle 20 suspended on the movable rail 17 moves by itself and transfers to the inner fixed rail 8', thereby making it possible to freely inspect the inside of the containment vessel 1.

Next, when storing the inspection vehicle 20 in the storage chamber 9, the above-described operation may be performed in reverse order.

〔Effect of the invention〕

As described above, according to the present invention, the containment vessel 1
An airtight hangar 4 equipped with a main rail 10 is provided in a part of the shielding wall 1a, and opening/closing doors 5 and 6 are provided on the front and side surfaces of the airtight hangar 4, and a drive cart 11 is orthogonally disposed on the main rail 10. Provided, this driving trolley 11
A movable rail 17 having a rack 18 is installed on each guide roller 16 so as to be freely movable.
A self-propelled inspection vehicle 20 is disposed at 7, and this movable rail 17 is connected to a pinion 1 that meshes with the rack 18.
9 selectively joins and connects to each fixed rail 8, 8', 8'' laid inside the reactor shielding wall 1a, so when the inspection vehicle 20 is not in use, it can be connected to the inside of the airtight hangar 4. In addition, even in the event of an accident, it can be protected from the harsh conditions inside the containment vessel 1, and this also prevents the inspection vehicle 20 from becoming radioactive. Not only can this inspection vehicle 20 be used, but it can also greatly extend the life of various measuring instruments installed in the inspection vehicle 20, and since it is easy to handle and operate, it has excellent effects such as being able to perform inspections quickly. It is.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a nuclear reactor incorporating an inspection vehicle containment vessel according to the present invention, FIG. 2 is a cross-sectional view of an inspection vehicle containment system for a nuclear reactor according to the present invention, and FIG. It is an enlarged sectional view along the dashed line AA in the middle. 1... Containment vessel, 1a... Shielding wall, 4... Closed hangar, 5, 6... Opening/closing door, 8, 8', 8''... Inner fixed rail, 9... Storage room, 10... Main rail , 11... Drive truck, 12... Drive device, 13
... Underframe, 14 ... Connection rod, 15 ... Rolling roller, 16 ... Guide roller, 17 ... Movable rail, 18 ... Rack, 19 ... Pinion, 20 ...
...Inspection car.

Claims (1)

[Claims] 1. An airtight hangar equipped with a main rail is provided in a part of the shielding wall of the containment vessel, each opening/closing door is provided on the front and side surfaces of this airtight hangar, a drive trolley is installed orthogonally to the main rail, and the drive trolley is installed at right angles to the main rail. A movable rail with a rack on each guide roller is installed so that it can run freely, a self-propelled inspection vehicle is installed on this movable rail, and this movable rail is laid inside the shielding wall using a pinion that meshes with the rack. A storage device for an inspection vehicle, characterized in that the storage device is configured to selectively join and connect to each of the fixed rails.