JPS6046677B2 - fuel transfer system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel transfer system for transferring nuclear fuel into and out of a nuclear reactor, which includes a fuel transfer machine running on an orbit.

A conventional fuel transfer system to which the present invention relates has a configuration as shown in FIGS. 1 and 2.

That is, a containment vessel 2, which houses therein a reactor vessel 1 surrounding a reactor core provided with fuel assemblies, communicates with a storage chamber 3 at its side. A storage room track 4 is provided in the storage room 3, and this track 4 is connected to a containment vessel track 5, and a fuel transfer machine 6 runs on these tracks 4 and 5. Below the track 4 in the storage room, a fuel storage tank 7, a fuel inspection tank 8, and a fuel transfer tank 9 are arranged in a straight line along the track. When transferring nuclear fuel into and out of the reactor during fuel exchange, inspecting it, storing it, etc. as necessary, the fuel transfer device 6 is used to raise and lower the fuel assembly, and also to move it horizontally. Fuel assemblies are taken in and out of various tanks 7 to 9 in the reactor vessel 1 and storage room 3. A conventional fuel transfer system is constructed as described above, and includes various tanks 7 necessary for handling nuclear fuel.
9 to 9 are arranged in a straight line along the storage room track 4 and immediately below it.

Therefore, the building forming the storage room 3 is large, the various tanks 7 and 8 in the storage room 3 are not arranged rationally, and the fuel transfer operation is complicated and time-consuming. In addition, in order to take fuel in and out through the storage chamber 3, the track extending through the fuel inlet/outlet provided in the wall surrounding the storage chamber 3 must be extended. Furthermore, if a track extending to the outside is provided, for example, in a direction perpendicular to the track within the containment vessel, it is necessary to separately install the external track and provide another fuel transfer device. In such a case, the structure of the fuel transfer system becomes more complicated, the reactor auxiliary building including the storage room becomes larger, and the work becomes more complicated and time-consuming. Therefore, an object of the present invention is to have a simple structure, to be able to transfer fuel in multiple directions using one fuel transfer device, to be able to carry out fuel loading and unloading easily and quickly, and to be able to use a reactor auxiliary building. An object of the present invention is to provide a fuel transfer system for a nuclear reactor that is downsized.

Next, the present invention will be explained with reference to embodiments of the present invention shown in FIGS. 3 and 4 of the accompanying drawings.

3 and 4, in the fuel transfer system of the present invention, a storage chamber track 11 provided in a storage chamber 10 communicating with a containment vessel 2 rotates within a substantially horizontal plane within the storage chamber 10. A rotary track 11 is possible.

The rotating track, i.e., the storage compartment track 11, is supported at its center by a rotating device 12 that rotatably supports the track 11. Immediately below the rotating circle of the rotating orbit 11, equipment necessary for handling spent fuel, such as a fuel storage tank 7, a fuel inspection tank 8, and a fuel transfer tank 9, are arranged in a circle centered on the rotation center of the rotating orbit 11. It is located. Also provided in the storage chamber 10 is a connecting track 13 which is connected to the containment vessel track 5 and can be connected to the rotating track 11 to connect these tracks.

In addition, a fuel loading/unloading port 14 is provided in the wall that partitions the storage room 10.
is formed, and an outer track 1 is formed inside the fuel carry-in/out port 14.
5 extends from the inside of the storage chamber 10 to the outside of the reactor equipment.
In order to take out the spent fuel, a fuel transfer device 6 is placed above the reactor vessel 1 and the fuel assembly is taken out from the core.

As shown in FIG.
That is, it is placed in a position aligned with the connecting track 13, the transfer machine 6 is moved on the track and moved onto the fuel storage tank 7, and the fuel assembly is lowered into the fuel storage tank 7. When transferring the fuel assembly hoisted by the transfer device 6 to a desired facility such as the fuel transfer tank 9 or the fuel inspection tank 8, the storage indoor track 11, which is a rotating track, is rotated and arranged on the circumference. The transfer machine 6 is moved above the various tanks, and the fuel assembly is lowered at that position. In addition, if the rotary orbit 11 is rotated while the transfer machine 6 is placed on the rotary orbit 11 and aligned with the external orbit 15, the transfer machine 6 will run on the external orbit 15 and move to the outside of the reactor facility, etc. may be transported to a location. When introducing new fuel into a nuclear reactor, operations similar to those described above are performed in approximately the reverse order.

As is clear from the above explanation, according to the fuel transfer system of the present invention, it is possible to transfer the fuel from the reactor to the fuel entry/exit entrance using a single fuel transfer machine, and it is possible to transfer the fuel from the reactor to the fuel entry/exit entrance in a direction perpendicular to the orbit inside the containment vessel. Fuel can also be transported in and out.

Furthermore, by appropriately selecting the rotation angle and rotation radius of the various tanks in the fuel storage chamber with respect to the rotation center of the rotating orbit, a large number of equipment can be rationally arranged within a relatively small area. Therefore,
Fuel exchange work can be performed efficiently, quickly and easily, and fuel handling buildings such as storage rooms can be made smaller. Furthermore, if necessary, the out-of-core orbit can be extended radially in multiple directions around the rotation center of the rotary orbit.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing an example of a conventional fuel transfer system, FIG. 2 is a plan sectional view of the fuel transfer system shown in FIG. 1, and FIG. 3 is a schematic vertical sectional view showing the fuel transfer system of the present invention.
4 is a cross-sectional plan view of the fuel transfer system of FIG. 3; FIG. 1... Nuclear reactor vessel, 2... Containment vessel,
5... Track inside the containment vessel, 6... Fuel transfer machine, 10... Storage room, 11... Track inside the storage room, 14...・Fuel entrance/exit, 15...
...extracore orbit.

Claims (1)

[Claims] 1. In order to transfer nuclear fuel into and out of the reactor, a storage chamber communicating with the containment vessel, an internal containment vessel track extending within the containment vessel from the reactor vessel to the storage chamber, and a track provided within the storage chamber and configured as described above. A track inside the storage vessel that can be connected to a track inside the containment vessel, a fuel carry-in/outlet provided in the storage chamber, a track outside the reactor that extends from the storage chamber to the outside of the reactor through the fuel carry-in/out port, and a track inside the containment vessel. In the fuel transfer system, the fuel transfer system includes the storage indoor track and a fuel transfer machine that runs on the outer-core track, wherein the storage indoor track is rotatably provided in the storage compartment in a horizontal plane, and the fuel transfer A fuel transfer system characterized in that the fuel transfer system is a rotating orbit that allows the aircraft to move within a circle of a predetermined radius within the storage chamber.