JPS60198492A - Nuclear fuel charge guide apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nuclear fuel loading guide device that guides fuel assemblies to positioning pins implanted at predetermined intervals on a core plate.

A conventional nuclear fuel loading guide device will be explained with reference to Fig. 1.
(a) is a guide member made using a flat plate to have the same dimensions as the actual fuel assembly, (b) is the upper nozzle attached to the upper end of the guide member (α), and (C) is the same guide member. The lower nozzle attached to the lower end of (α), (d) the actual fuel assembly being loaded, (d′) the actual fuel assembly already loaded,
(-) is the upper nozzle attached to the upper end of the same fuel assembly (d) (g'), (C is the lower nozzle attached to the lower end of the same fuel assembly (d) (d'), (A) is the lower core plate,
(, q) are positioning pins implanted at predetermined intervals on the core & The lower nozzle (C) is suspended by a fuel handling crane, and the guide member (α) is positioned by engaging the positioning pin (g) in the bottle hole provided in the lower nozzle (C), and then the fuel assembly (d) '& The guide member (α) and the loaded fuel assembly (d') are suspended by a fuel handling crane (see dashed arrow), and the positioning pin (q ) to position the fuel assembly (d), and then load the fuel assembly onto the core plate (A) in the same manner.

In the nuclear fuel loading guide device, the fuel assembly (d) cannot be loaded while the fuel handling crane is handling the guide member (a), which prolongs the loading time. In addition, there is a risk that the fuel assembly (d) being loaded may come into contact with the loaded fuel assembly (J') or the guide member (α), causing damage to the fuel assembly (d) (d'). Ta.

The present invention addresses the above-mentioned problems, and includes a nuclear fuel loading guide device that guides fuel assemblies to positioning bins installed at predetermined intervals on a core plate. Two guide members with inclined surfaces are arranged back to back, and a positioning bottle gripping device is provided on the bottom surface of each guide member to fit into and grip the positioning bottle, and a device for lifting and lowering is provided in each guide member. The nuclear fuel loading guide device is characterized in that the rings of each lifting drive device are connected via an extendable connecting device, and its purpose is to shorten the loading time. Damage to the fuel assemblies can be prevented due to contact between the guide member and the fuel assembly or white spots between the fuel assemblies.

Next, the nuclear fuel loading guide device of the present invention will be explained using an embodiment shown in Fig. 2.3.4.
(2d) (2b) is a ring screwed onto the same threaded shaft (1aXIh), (3a) (3b) is the same ring (2"X2h)
K A connecting rod guide member mounted so as to be pivotable in the horizontal direction, (4) a connecting rod fitted into the same guide 8 members (3α) (3b) so as to be movable in the axial direction, (5α) (5b)
is a guide member rotation drive motor that horizontally rotates the guide member (3α) (C3b), (9α) (9b) is a connecting rod moving drive motor that moves the connecting rod (4) in the axial direction, (7α) ) (7b) are guide members each having a guide slope (7α1) (7b, ) at least on the front, and the guide members (7α)Cab) are arranged back to back. Also, <8(L)C8b) is the same guide member (7α)
<7b) screw shaft rotation drive motor fixed in (6α
X6h) is a positioning bottle gripping device that fits into and grips positioning bottles (13) implanted at predetermined intervals on the lower core plate (14), and the same positioning bottle gripping device C6CL)C6h) is the guide member (7α) (7b
) is provided on the bottom of the In addition, (10) is for each of the above motors (5tx) (5h) (8tx) (8h) (9 (L) (
9h), etc., (11) is the fuel assembly being loaded, (11') is the loaded fuel assembly, and 0 is the fuel assembly (I+1) attached to the lower end of (11'). The lower nozzle 021 is provided with a bottle hole that engages with the positioning bottle 021.The guide slope (7",) C7b1) of the guide member (7α)C7h)
is a surface for guiding the lower nozzle (121) of the fuel assembly (11) to the position of the positioning bin (131), and the upper end (7α2) (7b2) of the guide slope (7α, The guide member (7a) is located below the middle part of the assembly (11') in the height direction, and the guide member (7a) is fixed by grasping the same guide pin 0:1, and then the screw shaft rotation drive motor (8
a), rotate the screw shaft (1α), and turn the ring (2
Place a) on top. This and guide member (3α) connecting rod (4) guide member (3h) II song 2k) screw 1t
lt (Ih) Screw shaft rotation drive'' l motor (8h), guide member (7h) and position 1# offshore bottle gripping device (6b) also rise at the same time, and positioning bottle gripping device (6b) When the upper row is above the height of (13), stop the screw shaft rotation drive motor (Ra)', start the leg rotation drive motor (5α) for the guide 9 member, and start the guide member (3α). )
and each of the above parts +41 (3A) (2b) (IA) (8
A) Turn the (7A) (6h) around the ring (2a) in the direction of the broken line in Figure 4, and at the same time start the connecting rod movement drive motor (9a) to move the connecting rod (4) in the extending direction. Activate it. The guide member (7h) is (71!) in Fig. 4.
), the respective motors (5αX9'Z) are stopped, the screw shaft rotation drive motor (8α) is started, the screw shaft (ILl, )'Y is rotated, and the ring (2α) is lowered. At this time, each of the above parts (3α) (41 (3b) (
2b) (lh) (8h) (7b) (6b) are also lowered at the same time, and the positioning bin gripping device (6b) fits into the positioning bin <131. Next, the same positioning bottle gripping device (6h) is activated, and the positioning bottle (13) is grabbed.
The guide member (7h) is fixed, and then the screw shaft rotation drive motor (8h) is started to rotate the screw shaft (1b) and raise the ring (2b) Y. At this time, the guide member (3b
) Connecting rod (4) Guide member (3α) Ring (2α) Screw shaft (1α) Screw shaft rotation drive motor (8a,) Guide member (
7 and the positioning bottle gripping device (6α) also rises at the same time, and the positioning bottle gripping device (6α) grips the positioning bottle (6α).
When the screw shaft rotation drive motor (8b) rises above the height of I3), the screw shaft rotation drive motor (8b) is stopped, and the guide member rotation drive motor (5
Start b) and remove the guide member (3h) and each of the above parts!
41 C3a) <2ta) <1ct) (8tx><7a
)C6rt) around the ring (2b) and at the same time start the connecting rod movement drive motor (9b) to operate the connecting rod (4) in the retracting direction. Guide slope (7α,
The lower end (7α3) (7h3) of >C7b, ) is located slightly above the positioning pin 03).

Next, the operation of the nuclear fuel loading guide device will be explained.

The loading of the fuel assembly (11) to the m position in Figure 4 is carried out by loading the fuel assembly (11) suspended by the fuel handling crane.
is hung down facing the guide inclined surface (7α1) of the guide member (7a), and is attached to the lower nozzle (121) of the fuel assembly (11).
This is done by bringing the guide surface (7f11) into contact with the guide slope (7f11).

After that, the fuel assembly (11) and the lower nozzle (12)
1 descends along the guide slope (7α1) (see the broken line in Figure 3), and the lower nozzle circle lands on the core plate (141) [
7, the pin hole of the lower nozzle O3 is in the core plate (14
] is engaged with the positioning pin (1) to complete loading to the position (11) in Fig. is carried out in the following manner.

That is, the positioning pin gripping device (6
α) (6α), positioning pin guide member (7α)
moves to position (7α') in Fig. 4, stop each of the above motors (5h) and (7b), and turn the screw shaft rotation drive motor (8
b), rotate the screw shaft (1b), and remove the ring (2).
h) lower. At this time, each of the above parts (3α) (4
1 (3a) (2α) (1α) (8α) (7α) (6α)
is simultaneously lowered, and the positioning pin gripping device (6α) fits into the positioning pin (13). Next, the positioning pin gripping device (6α) is activated to grasp the positioning pin 03) to fix the guide member (7α), and then the fuel assembly (11) suspended by the fuel handling crane is moved to the guide member (7α). ) to the guide slope (7α,) and lower the lower nozzle +121' of the fuel assembly (old) into contact with the guide slope (7α,), and then hang the same fuel assembly (11) and The lower nozzle 02 is connected to the same guide inclined surface (7α1
), and when the lower nozzle 02 lands on the core plate (141), one of the lower nozzle holes engages with the positioning pin (13) of the core plate (14), and the fourth Loading to position (m) in the figure is completed.
) is moved from the (7α) position to the (7a') position, but the movement to (7d') → C7b'), etc., or the movement of the guide member (7h) to other positions is also performed in the same manner. hand,
The fuel assemblies 0υ are loaded one after another at positions adjacent to the loaded fuel assemblies (11'). Note that each motor may be replaced with another drive device. Furthermore, if a guide slope is provided on the other side of each guide member, the fuel assembly can also be guided on that surface during loading.

The present invention provides a nuclear fuel loading guide device for guiding fuel assemblies to positioning pins implanted at predetermined intervals on a core plate as described above. The guide members are arranged back to back, and a positioning pin gripping device is provided on the bottom surface of each guide member to fit and grip the positioning pin, and a lifting drive device is provided in each of the guide members, and each of the guide members is provided with a lifting device. The ring of the lifting drive device is connected via an extendable connection device (7), and the above-mentioned operation is performed, so that the following effects can be achieved. Namely, in the conventional nuclear fuel loading guide device, the fuel handling crane is While handling the guide member (α), the fuel assembly could not be loaded (and the loading time was lengthened), but with the nuclear fuel loading guide device of the present invention, the fuel handling crane can easily load the fuel assembly to be loaded. The fuel handling crane can be used only for transporting fuel assemblies, as the guide member moves on the core plate to the specified location to prepare for loading the fuel assemblies. This reduces loading time.

In addition, the fuel assembly suspended by the fuel handling crane is lowered facing the guide slope of the guide member, and the lower nozzle of the fuel assembly is brought into contact with the guide slope. The lower nozzle is lowered along the guide slope and the lower nozzle's bottle hole is engaged with the positioning pin of the core plate, thereby preventing contact between the guide member and the fuel assembly or the fuel assembly that occurred during loading. This has the effect of preventing damage to the fuel assembly due to contact between them.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments (and that various design modifications may be made without departing from the spirit of the present invention). be.

[Brief explanation of the drawing]

Figure 1 is a side view showing a conventional nuclear fuel loading guide device;
The figure is a side view showing one embodiment of the nuclear fuel loading guide device according to the present invention, FIG. 3 is an enlarged side view thereof, and FIG. 4 is a plan view thereof. (Ill) (2a) (8a) and (1h)C2h) (8
h) - Lifting drive device, (2α) (2b)...Ring, (3z) (3b) f41/Connection device, (6a)
(6b)...Positioning bottle gripping device, (7α)<7
b)...Guiding member, (7a,) (7b1)...Guiding slope, (11)...Fuel assembly being loaded, (11'
)... Fuel assembly of loading tube, (13)... Positioning pin, (14)... Core plate. Sub-Agent Patent Attorney: Shige Okamoto (3 persons)

Claims (1)

[Claims] In a nuclear fuel loading guide device that guides a fuel assembly to positioning pins implanted at predetermined intervals on a core plate,
Two guide members each having a guide slope on the front are arranged back to back, and a positioning pin gripping device is provided on the bottom surface of each guide member to fit and grip the positioning pin, 1. A nuclear fuel loading guide device, characterized in that an elevating drive device is provided in each of the guide members, and the rings of each of the elevating drive devices are connected via an extendable connecting device.