JPS6158794B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for moving heavy objects such as fuel storage baskets, and more specifically, for example, in a spent fuel storage facility, the present invention relates to a device for moving heavy objects such as fuel storage baskets. It relates to equipment for moving heavy objects with high radioactivity, such as spent fuel, fuel storage baskets, and containers containing high-level radioactive waste, between

Spent fuel at spent fuel storage facilities is usually handled underwater, as its radioactivity is extremely high, using water as a shield. As shown in FIG. 1, a fuel storage pool 1 and a fuel handling pool 2 are provided, in which a fuel storage basket containing spent fuel is removed from a transport container (cask) or stored in a transport container. These are connected by a transfer waterway 3. A partition wall 4 is installed between the fuel storage area including the storage pool 1 and the waterway 3 and the fuel handling area including the handling pool 2 from the viewpoint of nuclear material protection, ventilation air conditioning, earthquake resistance, etc. Therefore,
In such facilities, a device is required to move the fuel storage baskets from one side of the handling pool 2 and the waterway 3 to the other under the bulkhead 4. As such a moving device, as shown in FIG.
An opening 5 is provided in the underwater part of the handling pool 2.
At the bottom of these rails 6 are provided which extend from the opening 5 to the water channel 3, and on this rail 6 a moving trolley 7 is mounted.
is placed on the trolley 7 by a crane (not shown).
It is known that a fuel storage basket A placed on a fuel storage basket A is moved from one of a handling pool 2 and a waterway 3 to the other by means of a cart 7. However, in such a device, main movable parts such as the trolley 7 are located underwater at the bottom of the handling pool 2 and waterway 3, making maintenance, inspection, repair, etc. difficult. The above work may not be possible because the radioactivity is particularly high compared to the above.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a device for moving heavy objects such as fuel storage baskets that is easy to maintain, inspect, and repair.

This invention will be explained in detail below with reference to embodiments shown in FIGS. 3 and 4.

3 and 4 show a part of the spent fuel storage facility, including a fuel handling pool 10 and a transfer channel 11.
A partition wall 12 extending from the water bottom to the ceiling of the building is provided between the two. The partition wall 12 has a line L from the bottom to the water surface.
A vertically elongated opening 13 extending upward is provided. The upper ends of a pair of swinging arms 14, 14 are supported at the upper end of an opening 13 on the partition wall 12 above the water surface L.
The upper end portions of another pair of swing arms 15, 15 disposed slightly outside of the swing arms 4, 14 are supported. Both upper and lower ends of a holding portion 16 of the fuel storage basket A are rotatably suspended from the lower ends of the upper and lower swinging arms 14 and 15, respectively. Also, opening 1
3. The partition wall 12 at the upper end has swing arms 14, 15.
A drive device (not shown) is provided by means of which the arms 14, 15 swing through the opening 13 to either side of the bulkhead 12, so that the holding part 16 is moved to one side of the handling pool 10 and the water channel 11. It is designed to move from one to the other. Water surface L of opening 13
In the upper part, there is a water surface L on both sides of the partition wall 12.
It is completely covered by a cover 17 provided slightly below. The bottom of this cover 17 is open so as not to hinder the swinging of the arms 14 and 15.

In the above, from the handling pool 10 to the waterway 11
When moving basket A to
After the basket A is inserted into the holding part 16 using a crane (not shown) or the like, the holding part 16 and the basket A are moved to the water channel 11 side by swinging the arms 14 and 15. do. On the waterway 11 side, this basket A is taken out using a crane (not shown), etc., and then the arms 14 and 15 are swung in the opposite direction to the above, and the empty holding part 16 is handled again and moved to the pool 10 side. Moving. When moving the basket A from the waterway 11 to the handling pool 10, the above operation may be performed in reverse. In some cases, the basket A may be left inserted in the holding part 16, fuel may be inserted into the basket A in one of the handling pool 10 and the water channel 11, and the arms 14 and 15 may be swung. , after moving this to the other side, it is also possible to take out only the fuel.

This invention can be applied not only to spent fuel storage facilities but also to other nuclear facilities such as reprocessing plants, and in addition to moving fuel storage baskets, it can also be used to move single fuel or to transport high-level radioactive waste. It can also be applied to moving containers, etc.

The moving device according to the present invention includes a pool 10 for handling heavy objects such as fuel storage baskets and a transfer waterway 11.
An opening 13 extending from the water to above the water surface is provided in the partition wall 12 installed between the water surface and the partition wall 12 above the opening 13 above the water surface so that the partition wall 12 can swing to both sides of the partition wall 12 through the opening 13. , swing arm 1
4 and 15 are supported, and the swinging arms 14,
The heavy object holding part 16 is suspended from the lower end of the water tank 15, and all the main movable parts are above the water surface, so maintenance, inspection, repair, etc. are extremely easy.

[Brief explanation of the drawing]

Fig. 1 is a plan view schematically showing a spent fuel storage facility, Fig. 2 is a schematic side view showing a conventional example, Figs. 3 and 4 show an embodiment of the present invention, and Fig. 3 is a schematic side view. FIG. 4 is a view taken along the line shown in FIG. 3. 10... Fuel handling pool, 11... Transfer channel, 12... Bulkhead, 13... Opening, 14, 15...
... Swinging arm, 16... Holding section.

Claims (1)

[Claims] 1 A bulkhead 1 installed between a pool 10 for handling heavy objects such as fuel storage baskets and a transfer waterway 11
2 is provided with an opening 13 extending from the water to above the water surface, and a partition wall 12 above the opening 13 above the water surface.
The upper ends of the swing arms 14 and 15 are supported so as to swing to both sides of the partition wall 12 through the opening 13, and the heavy object holder 16 is suspended from the lower ends of the swing arms 14 and 15. Equipment for moving heavy objects such as lowered fuel storage baskets.