JPH01239498A - Transport container for insertion material of fuel - Google Patents

Abstract

PURPOSE:To surely support respective rods to prevent the rods from oscillating at the time of transport of insertion materials by mounting a frame consisting of a horizontal part and vertical part onto a slender base plate and disposing front and rear double supporting frames at prescribed spaced intervals onto this frame. CONSTITUTION:A cap body 12 is removed from the base body 11 at the time of housing the insertion materials B. The frame 13 is then erected perpendicularly together with the base plate 11 with the bottom end positioned downward by a crane via hanging rings 25a, 25b provided to the front end of the frame 13 to press a dashboard 24a to a wall surface. This state is maintained. The pins 23 of respective supporting plates 15 are removed to unlock the plates from supporting plates 14 while the upper end plate b2 of the materials B is held butted against a contact plate 16. The respective insertion rods b1 are eventually embraced by long hole parts 18a having nearly the same bore as the bore of the rods b1 in differently sized long holes 18 of the superposed supporting plates 15. A set of the insertion materials B are thus securely supported into the frame 13 in a manner as not to oscillate.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is applicable to nuclear reactors, mainly pressurized water type nuclear reactors. Containers intended for transportation.

(Conventional technology) In pressurized water reactors, excessive reactivity can be suppressed,
Or long inserts such as burnable poison rod bundles (BPR) and control rod bundles (RCC) used to control output (lengths filled with burnable poisons or neutron absorbing materials) Conventionally, 16 to 24 rods of approximately 4 m in diameter and approximately 10 gourds in diameter, bound together with holding end plates or spiders, are stored in an elongated stainless steel container 1 as shown in Fig. From there, it is transported to the power plant where it will be used. (
The figure shows the case where the BPR is stored. ) The container 1 has a rectangular box shape with one side wall (earth wall in the figure) la that can be opened and closed, and a top lid 2 is removably attached to one end (the right end in the figure) and an insert is placed inside. The support plate 3 provided with through holes 3a according to the number and arrangement of the rods bl of B is spaced at a predetermined interval (approximately 60 mm, however, approximately half of that in the part that supports the right end plate b2), with a cushioning material interposed. To store the insert B, remove the top cover 2 and open the side wall 1a, stand the container 1 upright, and place the insert B suspended from above by a crane. 6 rods b1 are respectively inserted into the respective insertion holes 3a of the support plate 3 at the upper end and lowered,
The end plate b2 is brought into contact with the uppermost support plate 3, and 6
The rod b1 is supported by a plurality of support plates 3 and stored. Then, the side wall 1a is closed, the top lid 2 is attached, the container 1 is transported to the place of use on its side, the top lid 2 is removed again, the side wall 1a is opened, the container 1 is erected, and the stored inserts B
I try to pull it up and take it out.

(Problem to be Solved by the Invention) As mentioned above, the long insert is held by several support plates installed inside the container, but considering the influence of vibration during transportation, Until now, the through hole drilled in each support plate could not be much larger than the diameter of the rod of the insert;
It is designed to take a value close to the rod diameter, so
When inserting and withdrawing the insert, the 6 rods rub against the hole wall, damaging the cladding of the rods and causing corrosion.

Therefore, an object of the present invention is to provide a transport container that reliably supports the six rods to prevent them from swinging when transporting the inserts, while also allowing easy operation without damaging the rods during storage or removal. .

(Means and effects for solving the problems) Based on the above object, the present invention provides a container for transporting fuel inserts, which is formed of an elongated base and a box-shaped removable lid. A frame consisting of a horizontal part and a vertical part is attached to the top, and on the frame, double supporting frames are arranged in the front and back at a predetermined interval in the longitudinal direction. Two supporting plates each having a long hole close to the rod diameter of the object and a large-diameter hole larger than the rod diameter in the same number and position as the rods are slid in the vertical or horizontal direction. The six rods are movably stacked and fitted together, and when the insert is transported, the six rods are held in the long hole portion of the irregularly shaped hole, and when not transported, they are positioned in the large diameter hole. There is.

When loading the insert into the frame, the frame is stood up together with the base, and the overlapping support plates in each support frame on the frame are pulled out a fixed length vertically or horizontally to open each irregularly shaped elongated hole. By aligning the large diameter holes with each other, inserting the six insert rods into the large diameter holes, and then pushing each overlapping support plate a certain length into each support frame,
Each insertion rod is held in the small-diameter elongated hole portion of each irregularly shaped elongated hole so as not to shake, and in this state, the base is laid down, a lid is placed on it, and the rod is transported to a predetermined location.

In addition, when taking out the lid, remove the lid from the base, stand the base up, pull out the overlapping support plates in each support frame a certain length outward again, and remove the 6 rods that were held in the long holes. Place it in the diameter hole and pull it up.

(Example) In FIGS. 1 to 3, A is an elongated metal rectangular container body according to the present invention, which includes a base 11 having a plurality of leg members 11a at regular intervals on the lower surface, and a periphery of the base 110. It consists of a box-shaped lid 12 that is removably attached with fasteners 20 such as bolts, and a horizontal piece 13 is mounted on the base 11.
A and a central vertical piece 13b that doubles the vertical piece 13b form an inverted T-shape on the side, and a frame 13 is fixed to each side of the vertical piece 13b to hold the insert B through a cushioning material 21. .

On both sides of the vertical piece 13b of the frame 13, two supporting plates 15, which will be described later, are slidably held in the vertical or horizontal direction at a predetermined interval in the longitudinal direction. The thickly formed support frame 14 and the upper end plate b2 of the insert
A support frame 17 is provided to support the abutment plate 16 to be brought into contact with the support frame 17, and its inner end is fixed to the upper surface of the vertical piece 13b, and its outer end is fixed to the outer upper surface of the horizontal piece 13a.

As shown in FIG. 4A, the support plate 15 is provided with a flat part 15a at one end (the upper end in the figure), and the other end is attached with a slightly narrower width, forming a roughly rectangular shape. has a long hole 18 with a diameter slightly larger than the diameter of the rod b1 of the insert B.
It is considerably thicker than a and the rod diameter (about 1.5 to 2.0 times),
The irregularly shaped elongated hole 18 is made up of a large-diameter hole portion 18b with tapers on the front and back peripheries so that the rods BL can be inserted easily like a Ross. A first positioning hole 19a for transportation and a second positioning hole 19b for insertion/removal are drilled in the same number (20 in the figure) and in the same arrangement state, and in the lower central part of the drawing part 15a, a first positioning hole 19a for transportation and a second positioning hole 19b for insertion/removal are vertically formed. It is set in.

Then, as shown in FIGS. 2 and 3, two such support plates 15 are stacked one on top of the other vertically and the other sideways with the drawer portion 15a outside, so that each double Support frame 1
4, and when the insert B is not loaded, each support plate 15 has an irregularly shaped elongated hole 180 as shown in FIG. 5A.
The bottles 23 are pulled out to the outside so that the large diameter holes 18b are aligned, and the bottles 23 mounted on the support frame 14 with a spring bias are inserted into the second positioning holes 19b of each plate and held on the support frame 14. The inner end of the support plate 15 faces the 5-shaped support frame 14, and the supports provided on the horizontal piece 13a and the vertical piece 13b of the frame 13 are fixed to the frame 22.

In addition, the contact plate 16 supported by the support frame 17 at the forefront has the same number of through holes 16a (FIG. 2) of the same size as the irregularly shaped elongated holes 180 and the large diameter holes 18b of the support plate 14. It is perforated in the arrangement.

In addition, 24.24a in FIG. 1 is the rear part of the base 11 (
(at the bottom when erected) is a rod and abutment plate for adjusting the height and erecting angle, which are attached overflowing on both sides.

Based on the above configuration, when storing the insert B, the lid 12 is removed from the base 11, and the frame 13 is attached to the base 11 using a crane via the hanging rings 25a and 25b provided at the front end of the frame 13. Stand both of them in a vertical position with their rear ends facing down, and hold the abutment plate 24a in contact with the wall surface. From above, insert the 6 rods b+ of insert B of set - into the frame vertically. While inserting the insert B into the through hole 16a of the contact plate 16 aligned on one side of the piece 13b and the large diameter hole 18b of the overlapping support plate 15 as shown in FIG. 5A, insert the insert B into the upper end plate b2. is lowered until it hits the contact plate 16.

In that case, the through hole 16a of the contact plate 16 and the support plate 15
Since the large-diameter hole 18b is considerably larger than the diameter of the rod and has a tapered peripheral edge, each insertion rod bl is smoothly inserted into each hole without rubbing against each other.

Then, with the upper end plate b2 of the insert B in contact with the abutment plate 16, the bin 23 is removed from the second positioning hole 19b of each support plate 15 to release the locking relationship with the support frame 14, and each If the support plate 15 is pushed inward as shown by the solid arrow in FIG. The insert B of the pair B, which will enclose the insert rod bl, must be firmly supported on the frame 13 so as not to vibrate.

In this state, insert the bottles 23 on each support frame 14 into the first positioning holes 19a of each support plate 15, and
Lock 5 so that it does not move.

In this way, when one set of inserts B is loaded on one side of the frame 130, another set of inserts B is loaded and loaded on the other side in the same manner as shown in FIG. When finished, the base 11 is laid down, the lid 12 is applied, and the base 11 is transported to a predetermined location by vehicle or the like.

In addition, when taking out the insert B, the cover body 12 must be removed again.
, stand up the base 11, remove the bottle 23 from the first positioning hole 19a of each superposition support plate 15, and then pull out each superposition support plate 15 outward as shown by the dotted line arrow at the opening in FIG. 23 into the second positioning hole 19bK,
The elongated hole portion 18a of the irregularly shaped elongated hole 18 is separated from the insertion rod bl, and the large diameter hole portion 18b surrounds each insertion rod bl as shown in FIG. 5A. If the insert B is pulled upward in this state, each insert 11b+ can be easily taken out without being rubbed against the hole 18b.

In addition, in the illustrated example, multiple sets of inserts B can be stored, but it is also possible to store one set as in the conventional case, and the 6 pieces b1 can be stored separately without bundling. You can.

(Effects of the Invention) As described above, in this invention, a frame consisting of a horizontal part and a vertical part is mounted on a long and slender base as a transport container for fuel inserts of a nuclear reactor. A double support frame is installed in the front and rear with the same angle as the diameter of the rod. Two support plates installed in the same position as the rod are fitted together so that they can be slid vertically or horizontally, and each rod is wrapped in the elongated hole of the support plate when transporting the insert. Since the rod is held in the large diameter hole when not being transported, each rod can be firmly supported without vibration when transporting inserts such as flammable rods and control rods. Moreover, when storing the container in a container or taking it out, it is possible to avoid damage caused by rubbing against the holes in the support plate.
The rod can be easily and smoothly inserted and withdrawn.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a container according to the present invention. FIG. 2 is a sectional view taken along the line XX in FIG. 1. FIG. 3 is an enlarged perspective view of one support frame portion. Figure 4A is a front view of the support plate. The opening of the figure is a clear cross-sectional view taken along line 70Y-Y. FIG. 5A is an explanatory diagram showing the relationship between the irregularly shaped elongated hole and the insertion rod, respectively. FIG. 6 is a partially cutaway perspective view of a conventional container. In the diagram, 11...... Base 12...
・・・・・・Lid body, 13・・・・・・Fu
Shi-mu 13a...Horizontal piece 13b
・・・Vertical piece 14・・・・・・・・・branch
Holding frame 15... Support plate 16
......Abutting plate 17...
・Support frame 18...Irregular long hole 18a
...Long hole section 18b...Large hole section Patent applicant Nuclear Fuel Industries, Ltd.

Claims (1)

[Claims] It consists of an elongated base and a box-shaped removable lid.A frame consisting of a horizontal part and a vertical part is mounted on the base, and on the frame there are two front and rear sections spaced apart from each other at a predetermined distance in the longitudinal direction. A heavy support frame is arranged, and in the gap between each support frame, irregularly shaped long holes consisting of a long hole part close to the rod diameter of the insert and a large diameter hole part larger than the rod diameter are arranged according to the number of rods mentioned above. Two support plates provided at the same position are stacked so as to be slidable in the vertical or horizontal direction and are fitted together, and each rod is held in the elongated hole part of the irregularly shaped elongated hole when transporting the insert. A container for transporting a fuel insert, characterized in that the container is positioned in the large diameter hole when not being transported.