JPH01110297A - Basket for solid waste transporting vessel - Google Patents

Abstract

PURPOSE:To accommodate various solid waste in a single basket and ease handling by providing a large partition on its central bottom and setting detachable partition members. CONSTITUTION:Partition plates 30 at which an end thereof is joined on the bottom are assembled in lattice form, large square-shaped partitions 3 for fuel control rods are formed in the center part and small partitions 4 for fuel channel boxes are set on the circumference thereof. Lateral cross section partition members 9 which divide the large partition of the center part into four partitions 93 which are the same size as the small partitions 4 for fuel channel boxes are detachably inserted in the large partition 3. Therefore, many partitions for the fuel channel boxes are formed, and it is possible to make them very easily and quickly partitions for the fuel control rods in case of need.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a basket for a transport container for transporting radioactive solid waste discharged from a nuclear power plant.

(Prior art) Radioactive solid waste discharged from a nuclear power plant, such as fuel control rods, fuel channel boxes, or miscellaneous solid waste, is placed in a basket and inserted into a transport container and transported to a waste storage facility. and stored. During this transportation, it is necessary to hold each waste in the basket so that it does not move within the transport container. Conventionally, baskets with shapes corresponding to the types of waste have been prepared, and baskets with shapes corresponding to the types of waste have been used.

It is uneconomical to use multiple types of baskets in this way, and in order to eliminate this inconvenience, multiple partition plates are installed in each other's slits so that the size of the compartments within the basket can be changed. There has been proposed a structure that can be reassembled by fitting (Japanese Unexamined Patent Publication No. 160092/1982). However, this configuration has the disadvantage that the strength of the partition plate itself is weakened because extra slits are formed in the partition plate itself for reassembly, and furthermore, it is very time-consuming to reassemble the partition plate.

It has also been proposed to utilize the shape of the fuel control rod itself to insert a fuel channel box into the space defined by the fuel control rod inserted into the basket (Japanese Patent Application Laid-Open No. 162997/1982). . However, this configuration has a problem in that a corresponding number of fuel channel boxes are always transported together with the fuel control rods at the same time. In other words, most of the solid waste emitted from normal nuclear reactors is fuel channel boxes;
Therefore, the fuel channel box that is generated in large quantities,
The above structure, which requires loading together with fuel control rods that generate only a small amount of fuel, cannot provide a sufficient transportation function. Furthermore, since the fuel control rods and the fuel channel box have different lengths, there is a problem in that it is inconvenient to handle the fuel control rods and the fuel channel box when they are combined and loaded into the basket.

(Object of the Invention) This invention was made to eliminate such conventional drawbacks, and it is possible to store fuel control rods, fuel channel boxes, and miscellaneous solids storage boxes in a single basket. To provide a basket for a solid waste transport container that is flexible and easy to handle.

(Structure of the Invention) The present invention provides a basket to be inserted into a solid waste transportation container, in which a plurality of large bottomed compartments with a rectangular cross-sectional shape into which fuel control rods are inserted are formed in the center. , a plurality of bottomed small compartments into which fuel channel boxes are inserted are formed around the large compartment, and the compartments are arranged so that the cross-sectional shapes of both compartments are substantially inscribed in the inner surface of the transport container, and the large compartment A partition member having a cross-shaped cross section that divides the compartment into four equal parts is removably inserted into the compartment, and the divided compartments are formed to have the same size as the above-mentioned small compartment. .

A spacer that supports the upper end of the fuel channel box at a predetermined height within the basket is removably disposed at the bottom of each of the small and large sections partitioned by the partition member. is preferred.

In the above configuration, by inserting a partition member into the large central section, it is possible to form a section for the fuel channel box, which is used for most purposes, and by removing the partition member, it is possible to form a section for the fuel channel box, which is used for most purposes. The spacers can facilitate the handling of waste of different lengths, and switching between these compartments can be done very easily and quickly.

(Example) In FIGS. 1 to 3, a basket 1 inserted into a solid waste transport container (cask) (not shown) has a large rectangular section 3 in the center into which a fuel control rod 20 is inserted. A plurality of small compartments 4 are formed around which a fuel channel box (not shown) is inserted, and a bottom plate 2 is provided at the bottom of each of the large compartments 3 and small compartments 4.

The overall cross-sectional shape of the large section 3 and the small section 4 is such that both sections are arranged so as to be almost inscribed in the inner surface of the transport container, and in the above embodiment, there are three large sections 3 for the fuel control rods 20 each in the vertical and horizontal directions. , a total of nine fuel channel box subdivisions 4 are formed adjacent to each side thereof.

The large section 3 and the small section 4 are constructed by assembling partition plates 30, one end of which is joined to the bottom plate 2, in a lattice shape. The partition plate 30 and the bottom plate 2 are made of, for example, 5US30
It is composed of 4. 8 is a lug for lifting the basket 1, 81 is a shielding plate, and 82 is a guide plate used when inserting the basket 1 into a transport container.

A spacer 7 is removably disposed at the bottom of the compartment 4 into which the fuel channel box is inserted, and supports the upper end of the fuel channel box at a predetermined height within the basket 1. This spacer 7 is the fourth
As shown in the figure, a cylindrical body 70 in the center and wing members 71 and 72 formed to protrude radially around the upper and lower parts of the cylinder body 70 are formed. A fuel channel box is placed on the upper end surfaces of the body 70 and the wing member 72.

Furthermore, spacers 6 are provided at each corner of the bottom of the large central section 3, and a miscellaneous solids storage box (not shown) is placed on the top surface 60 of the spacer 6. This miscellaneous solids storage box usually has a cross section that is the same as the shape of the large compartment 3, and is slightly lower in height than the fuel control rods 20, so that it cannot be stored in the basket 1. The upper end portion is raised with a spacer 6 to a suitable height. Fuel control rod 2 as a storage box for miscellaneous solids
When using one having the same height as 0, it is not necessary to form this spacer 6.

A partition member 9 having a cross-shaped cross section is removably inserted into the central large compartment 3 to divide the compartment into four as shown in FIG. It is formed to have the same size as the small section 4 for use. This partition member 9 has a bottom base 9 as shown in FIG.
It consists of a shelf board 90 installed at the same height as the 4 and spacer 7, and a partition plate 91 installed in a cross shape thereon, and a protrusion 92 is formed at the upper end of this partition plate 91. The portion 92 serves as a grip portion for inserting and removing the partition member 9.

In the above configuration, normally the partition member 9 is inserted into the large compartment 3 to form a compartment 93 of the same size as the small compartment 4, as shown in FIG. form a compartment; Then, a fuel channel box (not shown) is inserted into these small compartments 4, 93, and the fuel is transported to a predetermined location by inserting it into a transport container.

When transporting the fuel control rod 20, the spacer 7 is not inserted into the large compartment 3, but the fuel control rod 20 is inserted with its lower end in contact with the bottom plate 2 of the basket 1. On this occasion,
Parcel 4 may not be used or
Alternatively, a fuel channel box may be inserted through the spacer 7. Furthermore, when transporting miscellaneous solid waste, a miscellaneous solids storage box filled with miscellaneous solid waste may be inserted into the large compartment 3 so that its lower end abuts against the spacer 6. In this case as well, the small section 4 may not be used as described above, or may be used for a fuel channel box.

(Effects of the Invention) As explained above, according to the present invention, by inserting a partition member into the large central section, a large number of 9 sections for fuel channel boxes, which are mostly used, can be formed. Moreover, by removing the partition member, it can be used as a compartment for fuel control rods, and a single basket can be used for waste of various shapes, and switching between these compartments is extremely easy. It can be done easily and quickly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIGS. 2 and 3 are lines II-II and ■-■ in FIG. 1, respectively.
4 and 5 are perspective views of the spacer, FIG. 6 is a view corresponding to FIG. 3 with the partition member inserted, and FIG. 7 is a perspective view of the partition member. 1...Basket, 2...Bottom plate, 3...Large section,
4゜93...Small section, 6.7...Spacer, 9...
- Partition member, 20... fuel control rod. Figure 6 Figure 7

Claims (1)

[Claims] 1. A basket to be inserted into a solid waste transportation container, which has a plurality of large bottomed compartments with a rectangular cross-sectional shape in the center, into which fuel control rods are inserted; A plurality of small compartments with bottoms into which fuel channel boxes are inserted are formed around the fuel channel box, and both compartments are arranged so that the cross-sectional shape of both compartments is almost inscribed in the inner surface of the transport container, and the large compartment is is characterized in that a partition member having a cross-shaped cross section that divides the compartment into four equal parts is removably inserted, and the four divided compartments are formed to have the same size as the small compartment. Baskets for solid waste transport containers. 2. A spacer is removably disposed at the bottom of each of the small and large sections partitioned by the partition member to support the upper end of the fuel channel box at a predetermined height within the basket. A basket for a solid waste transport container according to claim 1, characterized in that: 3. According to claim 1 or 2, the large sections are formed in three lengths and the widths, and four small sections are formed adjacent to each side of the large sections. basket for solid waste transport containers.