JPH0715510B2 - Fuel insert transport container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is used in a state in which long inserts such as burnable poison rods and control rods used mainly in a pressurized water reactor are bundled or in a loose state. It relates to a container adapted to be transported.

(Prior Art) In a pressurized water reactor, suppressing excess reactivity,
Or long inserts such as burnable poison rod bundle (BPR) and control rod bundle (RCC) that are used to control the output (the length filled with burnable poison or neutron absorber inside is 16 to 24 rods of about 4 m in diameter and about 10 mm in diameter, which are bundled with a holding end plate or a spider) are conventionally stored in an elongated uninhibited steel container 1 as shown in FIG. It is transported from the factory to the power plant where it is used. (The figure shows the case where the BPR is stored.) The container 1 is a rectangular box whose one side wall (upper wall in the figure) 1a can be opened and closed, and the upper lid 2 is attached and detached at one end (the right end in the figure). A support plate 3 which is mounted so as to be provided therein and has through holes 3a according to the number and arrangement of the rods b ₁ of the insert B is arranged at a predetermined interval (about 60).
cm, but approximately half of that in the part supporting the end plate b ₂ on the right end), which is arranged under the cushioning material, and the insert B
When storing the container 1, the container 1 is erected with the upper lid 2 removed and the side wall 1a opened, and the rods b ₁ of the insert B hung by a crane from above are supported at their upper ends. Board 3
While being inserted into each of the insertion holes 3a, the end plate b ₂ is brought into contact with the uppermost support plate 3 and each rod b ₁ is supported by the plurality of support plates 3 and stored. Then, the side wall 1a is closed and the upper lid 2 is attached, the container 1 is laid sideways and transported to the place of use, the upper lid 2 is removed again, the side wall 1a is opened, and the container 1 is erected, and the stored insert B is pulled up. I take it out.

(Problems to be Solved by the Invention) As described above, the long insert is held by several support plates erected in the container, but in consideration of the influence of vibration during transportation. , Up to now, the through holes formed in each support plate cannot be made much larger than the diameter of the insert rod,
It is designed to have a value close to the bar diameter, so
When inserting or pulling out the insert, each rod rubs against the hole wall, which damages the cladding of the rod and causes corrosion.

Therefore, it is an object of the present invention to provide a transportation container that securely supports each rod so as not to shake during transportation of an insert, and that can be easily worked without damaging the rod during storage or removal. .

(Means and Actions for Solving Problems) Based on the above-mentioned object, the present invention provides a transportation container for a fuel insert, which is formed of an elongated base and a box-shaped removable lid, and has a base. A frame consisting of a horizontal piece and a vertical piece is mounted on the upper part, and double front and rear support frames are arranged on the frame at predetermined intervals in the longitudinal direction. The two support plates are provided vertically or horizontally with irregular shaped elongated holes consisting of a long hole portion close to the rod diameter of the object and a large diameter hole larger than the rod diameter at the same number and placement position of the insert rods. In this case, the rods are slidably overlapped in the direction of, and each rod is wrapped in the long hole of the modified elongated hole when the inserted product is transported, and is positioned in the large diameter hole when not transported. It is characterized by that.

Then, when the insert is loaded into the frame, the frame is erected together with the base, and the polymerized support plates in each of the support frames on the frame are vertically or horizontally pulled out to the outside by a certain length to form the odd-shaped elongated holes. By matching the large-diameter holes, inserting the rods of the inserts into the large-diameter holes, and then pushing the polymerization support plates into the support frames by a certain length.
Each insertion rod is wrapped in a small-diameter long hole portion of each odd-shaped long hole so as not to shake, and in this state, the base is laid down, and a lid is provided on the base to transport it to a predetermined place.

In addition, when taking out, remove the lid from the base and erect the base, pull out the overlapped support plate in each support frame to the outside for a certain length again, and remove the rods that were wrapped in the long holes. Position it in the bore and pull it up.

(Embodiment) In FIGS. 1 to 3, A is an elongated metal rectangular container body according to the present invention, and a plurality of leg members are provided on the lower surface at regular intervals.
It is composed of a base 11 provided with 11a and a box-shaped lid 12 which is detachably attached to the periphery of the base 11 by fastening tools 20 such as bolts. 13a and a central vertical piece 13b that bisects the same, forming a side-reverse T-shape vertical piece 13b
Frames 13 for holding the inserts B on both sides of the are fixed via cushioning materials 21.

Then, on both sides of the vertical piece 13b of the frame 13, two front and rear supporting plates 15 to be described later are slidably sandwiched vertically or horizontally at a predetermined interval in the longitudinal direction so as to be L-shaped. A support frame 14 that is formed to be heavy and a support frame 17 that supports the contact plate 16 that should contact the upper end plate b ₂ of the insert are disposed, and their inner ends are fixed to the upper surface of the vertical piece 13b. The outer end is fixed to the outer upper surface of the horizontal piece 13a.

The support plate 15 has one end (upper end in the figure) as shown in FIG.
A pulling part 15a is provided on the other end, and the other end is stepped slightly narrower to form a substantially rectangular shape.
Bar as between the long holes 18a of diameter slightly larger than the diameter of the bar b _1, quite large (1.5 to 2.0 times) than the rod diameter b view
The deformed oblong hole 18 composed of large-diameter hole portions 18b tapered on the front and back edges so that b ₁ can be easily inserted has the same number as the number of interpolating rods b _{1 with} the oblong hole portion 18a being the puller side (Fig. 20), and the first positioning hole 19a for transportation and the second positioning hole 1 for insertion / removal are formed in the lower central portion of the pulling part 15a.
9b are provided above and below.

And, two such support plates 15 are shown in FIG.
As shown in FIG. 3, one side is placed vertically and the other side is placed sideways with the pull tab 15a on the outside, and they are inserted into the gaps of the double support frames 14 respectively, and the insert B is not loaded. Sometimes, each support plate 15 has a large-diameter hole portion 18 of a deformed elongated hole 18 as shown in FIG.
A pin 23 that is pulled out to match b and is attached to the second positioning hole 19b of each plate on the support frame 14 by spring biasing.
Is inserted and held by the support frame 14, and the inner end of each support plate 15 faces the L-shaped support frame 14 and the horizontal piece 13a of the frame 13.
And is received by a receiving frame 22 provided on the vertical piece 13b.

Further, the contact plate 16 supported by the frontmost support frame 17 has the same number of through holes 16a (FIG. 2) as the large-diameter hole portions 18b of the deformed elongated holes 18 of the support plate 14, It is drilled in the same arrangement.

Reference numerals 24 and 24a in FIG. 1 denote a rod and an abutting plate for adjusting the height and the standing angle, which are mounted along both sides of the rear portion of the base 11 (which becomes the lower portion when standing up).

Based on the above configuration, when storing the insert B, the base is
The lid 12 is removed from the frame 11, and the frame 13 is mounted on the base by a crane via the suspension rings 25a and 25b provided at the front end of the frame 13.
Both 11 together is raised to a vertical position by the rear end down, the abutment plate 24a retains its state is brought into contact with the wall from above, each bar b ₁ of a set of inner Sashimono B As shown in FIG. 5A, while inserting the insert B into the through hole 16a of the contact plate 16 and the large-diameter hole 18b of the overlapping support plate 15 which are aligned on one side of the frame vertical piece 13b, the insert B is placed on the upper part thereof. The end plate b ₂ is lowered until it abuts on the contact plate 16.

At that time, since the large-diameter hole portion 18b of the through hole 16a and the support plate 15 of the contact plate 16 is provided with a taper considerably large and the peripheral edge than rod diameter, each inside挿棒b ₁ in each hole It is inserted smoothly without rubbing.

Then, with the upper end plate b ₂ of the insert B hitting the contact plate 16, the pin 23 from the second positioning hole 19 b of each support plate 15 is inserted.
To remove the locking relationship with the support frame 14 and push each support plate 15 inward as indicated by the solid line arrow in FIG. 5A. Then, as shown in FIG. will be embracing the by the connexion each挿棒b ₁ to the long hole portion 18a of substantially the same diameter as the inner挿棒b _1, a pair of inner Sashimono B is supported on the frame 13 reaper quality so as not to vibrate To be done.

In this state, the pins 23 on each support frame 14 are in turn connected to each support plate 15
It is inserted into the first positioning hole 19a and the support plate 15 is locked so as not to move.

In this way, when one set of inserts B is loaded on one side of the frame 13, another set of inserts B is also loaded on the other side in the same procedure as shown in FIG. After that, the base 11 is laid down sideways, the lid 12 is applied, and the vehicle is transported to a predetermined place by a vehicle or the like.

When taking out the insert B, the lid 12 is removed again, the base 11 is erected, and the pin 23 is removed from the first positioning hole 19a of each polymerization support plate 15, and this time, each polymerization support is performed. Board 15
To the outside as shown by the dotted arrow in Fig.
By inserting into the second positioning hole 19b, away from the long hole portion 18a is the inner挿棒b ₁ profiled slot 18, the large-diameter hole portion as in Figure 5 b 1
8b surrounds each interpolating rod b ₁ . If the insert B is pulled up in this state, each insert rod b ₁ can be easily taken out without rubbing the hole 18b.

In the illustrated example, a plurality of sets of the inserts B can be stored, but this may be one set as in the conventional case, and each rod b ₁ may be stored separately without being bundled. You may

(Effects of the Invention) As described above, according to the present invention, a frame composed of a horizontal portion and a vertical portion is mounted on an elongated base as a transportation container for fuel inserts of a nuclear reactor, and a predetermined interval is provided on the frame. The front and rear double support frames are arranged, and in the gaps between the support frames, odd-shaped long holes composed of long holes close to the rod diameter of the insert and large diameter holes larger than the rod diameter are used. The two support plates, which are arranged at the same position, are fitted so that they can slide vertically or horizontally, and when transporting the insert, each rod is wrapped with the elongated hole of the modified elongated hole of the support plate. Since it is held and positioned in the large-diameter hole during non-transportation, it is possible to firmly support each rod without vibrating it when transporting an insert such as a burnable poison rod or a control rod, and Each rod does not get damaged by rubbing against the holes in the support plate when storing or removing it in the container. Can be inserted and pulled out easily and smoothly.

[Brief description of drawings]

FIG. 1 is a perspective view in which a part of the container according to the present invention is cut away. FIG. 2 is a sectional view taken along line XX of FIG. FIG. 3 is an enlarged perspective view of one support frame portion. FIG. 4A is a front view of the support plate. Figure B is a cross-sectional view along the line YY. 5 (a) and 5 (b) are explanatory views showing the relationship between the deformed elongated hole and the insertion rod. FIG. 6 is a perspective view in which a part of a conventional container is cut away. In the figure, 11 ... base, 12 ... lid 13 ... frame, 13a ... horizontal piece 13b ... vertical piece, 14 ... support frame 15 ... support plate, 16 ... contact plate 17 ... Support frame, 18 ... odd-shaped long hole 18a ... long hole, 18b ... large-diameter hole

Claims (1)

[Claims] 1. A slender base and a box-shaped detachable lid. A frame composed of horizontal and vertical pieces is mounted on the base, and a predetermined interval is provided in the longitudinal direction on the frame. A double support frame is placed at the front and the rear, and in the gap between the support frames, a modified elongated hole consisting of a long hole portion close to the rod diameter of the insert and a large diameter hole larger than the rod diameter Two support plates, which have the same number of rods and the same positions as the inserts, are slidably stacked in the vertical or horizontal direction and are fitted together. A transportation container for a fuel insert, characterized in that it is enclosed in a long hole portion of a long hole and is positioned in a large diameter hole portion when not being transported.