JP3100496B2 - Non-nuclear fuel core component insertion jig and non-nuclear fuel core component insertion jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-nuclear fuel core component insertion treatment for use in inserting a non-nuclear fuel core component such as a control rod cluster, a burnable poison assembly, and a neutron source assembly into a nuclear fuel assembly. The present invention relates to an insertion device provided with a tool and a jig for inserting a non-nuclear fuel core component.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 8, an upper nozzle 1 and a lower nozzle 2 which are arranged at a predetermined distance from each other, and these nozzles 1, 2
A plurality of support grids 3 arranged at a predetermined distance therebetween and having a grid space formed by straps, inserted into the grid spaces of these support grids 3 and coupled to each support grid 3 A number of control rod guide tubes 4 connected to the nozzles 1 and 2 and a plurality of control rod guide tubes 4 inserted into the lattice spaces of the support lattices 3 and elastically supported by springs formed in the support lattices 3. A fuel rod 5 is known. After the assembly, the nuclear fuel assembly 6 is assembled with the control rod cluster 10 as shown in FIG. 9 or the burnable poison assembly 1 as shown in FIG.
1 is transported to a nuclear power plant or the like while being inserted into each of the control rod guide tubes 4. Here, the control rod cluster 10 shown in FIG. 9 has a large number of vanes 101 radially provided on the outer periphery of the spider body 100, cylindrical fingers 102 attached to the tips of these vanes 101, and these fingers 102. A control rod 103 is attached to a lower part of the spider body, and a retainer 105 is provided movably up and down along a bolt 104 attached to the inside of the spider body 100, while the retainer 105 is moved downward around the bolt 104. The spring 106 to be urged is mounted. The burnable poison aggregate 11 shown in FIG.
0, a burnable poison stick 111 and a thimble plug 112 are attached to the base plate 1.
10, a spring guide 113 is fixed to the center of the
4 is provided so as to be movable in the vertical direction, and a hold-down spring 115 is mounted between the hold-down bar 114 and the base plate 110 and around a spring guide 113.

[0003]

By the way, as described above, the nuclear fuel which has been carried into a nuclear power plant or the like with the control rod cluster 10 or the burnable poison assembly 11 inserted into each control rod guide tube 4 is described. In the assembly 6, the control rod cluster 1 has conventionally been used for the delivery at the power plant.
The on-site inspection (site surveillance) is performed by pulling out the 0 or burnable poison assembly 11 from each control rod guide tube 4. And after on-site inspection is completed,
The control rod cluster 10 or the burnable poison assembly 11 is inserted into each control rod guide tube 4 of the nuclear fuel assembly 6. In this case, a number of long control rods 103 or burnable poison rods 111, thimble plugs 112
Must be inserted into each control rod guide tube 4 of the nuclear fuel assembly 6 at the same time, so that there is a problem that positioning is difficult and the insertion work is troublesome.

The present invention has been made in view of the above circumstances, and an object of the present invention is to smoothly and surely attach a non-nuclear fuel core structure such as a control rod cluster or a burnable poison assembly to a nuclear fuel assembly. An object of the present invention is to provide a jig for inserting a non-nuclear fuel core component and a jig for inserting the non-nuclear fuel core component which can be inserted.

[0005]

In order to achieve the above object, a first aspect of the present invention is a jig used for inserting a non-nuclear fuel core component into a nuclear fuel assembly. A frame member detachably provided on the upper portion of the frame, a pair of guide members provided on inner surfaces adjacent to the frame and formed with a number of guide grooves respectively engaged with and disengaged from the non-nuclear fuel core component, and the frame And a guide member formed with a number of guide grooves which are detachably mounted on the upper part of the non-nuclear fuel core structure.
According to a second aspect of the present invention, the guide groove of the guide member or the guide groove of the guide member is set to have a length that fits at least with the rod-shaped bodies of the non-nuclear fuel core constituting body arranged in a line. is there. Further, a third aspect of the present invention is directed to a frame body detachably provided on an upper portion of the nuclear fuel assembly, a pair of guide members provided on adjacent inner surfaces of the frame body and having a plurality of guide grooves, respectively , A guide member having a guide member having a plurality of guide grooves and being detachably mounted on an upper part of a body, wherein the insertion device inserts a non-nuclear fuel core component into a nuclear fuel assembly; A non-nuclear fuel core component elevating means provided detachably on the body and raising and lowering the non-nuclear fuel core component; a frame body vertical means provided on the frame and raising and lowering the frame; and the guide member And a guide member moving means for engaging and disengaging the guide groove of the guide member with the non-nuclear fuel core component, and the guide groove of the guide member provided with the guide member and connecting the guide groove of the non-nuclear fuel core component to the non-nuclear fuel core component Person in charge Those made up of the guide member moving means for.

[0006]

According to the first aspect of the present invention, there is provided a jig for inserting a non-nuclear fuel core component, wherein a frame is mounted on an upper part of the nuclear fuel assembly.
With the lower part of the non-nuclear fuel core component engaged with the guide groove of the guide member to regulate the position of the lower part of the non-nuclear fuel core component, the non-nuclear fuel core component is lowered, and The nuclear fuel assembly and the non-nuclear fuel core component are aligned with each other by being inserted into the space defined by the guide groove of the member and by mounting the guide member on the upper portion of the frame, thereby providing the non-nuclear fuel core component. Is smoothly inserted into the nuclear fuel assembly. Further, according to claim 2 of the present invention, at least a guide groove of a guide member or a guide groove of a guide member set to a length to be fitted with a rod-like body arranged in a row of a non-nuclear fuel core component, The position of each rod of the non-nuclear fuel core component can be adjusted to the nuclear fuel assembly with higher accuracy, and the non-nuclear fuel core component can be reliably inserted into the nuclear fuel assembly. Further, claim 3 of the present invention
In the state where the pair of guide members in the frame is set at a predetermined position by the guide member moving means, the frame positioned above the nuclear fuel assembly is lowered by the frame vertically moving means, and After being mounted on the upper part, the guide member is moved by the guide member moving means to be engaged with the lower part of the non-nuclear fuel core structure, and the non-nuclear fuel core structure is lowered by the non-nuclear fuel core structure elevating means. The lower portion of the non-nuclear fuel core component is inserted into the space defined by the two guide members of the frame, and
The guide member is mounted on the upper portion of the frame, and further, the lower portion of the non-nuclear fuel core structure is inserted into the nuclear fuel assembly, and then the guide member is moved by the guide member moving means and separated from the non-nuclear fuel core structure, And, in a state where the guide member is moved by the guide member moving means and disengaged from the non-nuclear fuel core structure, the non-nuclear fuel core structure is lowered by the non-nuclear fuel core structure elevating means, so that the non-nuclear fuel core structure is lowered into the nuclear fuel assembly. The frame is completely inserted, and finally, the frame is lifted and removed from the upper portion of the nuclear fuel assembly by the frame vertical means.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In these figures, reference numeral 20 denotes a guide jig. The guide jig 20 mainly includes a frame 21 and a pair of plate-like guide members 22 provided inside the frame 21. It is configured. The frame body 21 is formed by combining four plate-like members 211 each having a rectangular opening 210 formed in the center thereof in a rectangular tube shape. Legs 212 are formed at the lower four corners of the frame 21, and some of the legs 212 have guide pin holes formed at the corners of the upper nozzle 1 of the nuclear fuel assembly 6. A pin 213 fitted to 1a is formed. Also,
A rectangular notch 214 is formed on the upper side of each plate member 211 of the frame 21. Further, on the inner surface of the frame body 21, the base corners of the pair of guide members 22 are supported rotatably in the vertical direction, and the rotation center axes of these guide members 22 cross each other at right angles. Is set to A large number of guide grooves 220 are provided in each of the guide members 22, respectively.
2 are formed along a direction orthogonal to the rotation center axis. Furthermore, the protrusions 300 formed on the four sides of the pair of plate-shaped guide members 30 are detachably mounted in the notches 214 on the upper part of the frame 21. Each of the guide members 30 has a plurality of guide grooves 301 formed therein.
0 guide groove 301 and guide groove 220 of guide member 22
Are set slightly larger than the outer diameter of the control rod 103 or the burnable poison rod 111, and the lengths of the guide grooves 301 and the guide grooves 220 are at least one row. Alternatively, the length is set to fit the burnable poison rod 111.

The control rod 103 of the control rod cluster 10 (or the burnable poison set) is inserted into each control rod guide tube 4 of the nuclear fuel assembly 6 by using the jig for inserting a non-nuclear fuel core component constructed as described above. When inserting the burnable poison rod 111 of the body 11, first, as shown in FIG. 3, the winch is started from above the upper nozzle 1 of the nuclear fuel assembly 6 housed upright in the fuel rack 40. The guide jig 20 suspended by the frame body vertically moving means is lowered, and the pins 213 of the frame 21 of the guide jig 20 are fitted into the guide pin holes 1 a of the upper nozzle 1 to guide the guide jig 2.
0 is fixed on the upper nozzle 1 of the nuclear fuel assembly 6. Next, as shown in FIG.
03 is fitted into the guide groove 301 of the pair of guide members 30. That is, a guide member moving means such as an air cylinder is provided on a base plate provided below the non-nuclear fuel core structural body elevating means such as a winch which suspends the control rod cluster 10. By moving both guide members 30 in the horizontal direction by means and engaging the lower portions of the control rods 103 with the guide grooves 301 of the guide members 30, the distance between the control rods 103 is regulated to a predetermined distance. Subsequently, in this state, as shown in FIG. 5, the control rod cluster 10 is lowered by the non-nuclear fuel core structure lifting / lowering means, and the lower part of the control rod 103 is rotated in the frame 21 in advance. The protrusion 30 of the guide member 30 is inserted into the space defined by the respective guide grooves 220 of the guide member 22 positioned on the horizontal section of the frame 21 and is engaged with the lower part of the control rod 103.
0 is mounted and fixed to the notch 214 of the frame 21. In this case, since the movement of the lower part of each control rod 103 in the horizontal plane is regulated by the guide member 30, the respective control rods 103 are placed in the space formed by the respective guide grooves 220 of the guide member 22 of the frame 21. The lower part can be inserted smoothly.

Next, the control rod cluster 10 is further lowered by the non-nuclear fuel core structure lifting / lowering means, and the lower part of each control rod 103 is inserted into the nuclear fuel assembly 6. In this case, the lower part of each control rod 103 is provided with each guide groove 220 of the guide member 22 in the frame 21 and the notch 21 in the upper part of the frame 21.
Since the frame 21 is mounted on the upper nozzle 1 of the nuclear fuel assembly 6 by being supported and guided by each guide groove 301 of the guide member 30 mounted on the nuclear fuel assembly 4, each of the nuclear fuel assembly 6 and the control rod cluster 10 is provided. The control rod 103 is securely aligned,
Therefore, each control rod 103 is smoothly inserted from the upper nozzle 1 of the nuclear fuel assembly 6. Subsequently, as shown in FIG. 6, the two guide members 30 are moved by the guide member moving means.
Is moved upward and horizontally to release the engagement between the guide groove 301 of the guide member 30 and the lower portion of the control rod 103, and the guide member 22 in the frame 21 is moved downward by the guide member moving means. After the rotation, the control rod cluster 10 is lowered by the non-nuclear fuel core structure lifting / lowering means, and the control rods 103 are completely inserted into the nuclear fuel assembly 6. Further, after the control rod 103 is completely inserted, the non-nuclear fuel core structure elevating means is removed from the control rod cluster 10, and the guide jig 20 is lifted up by the frame vertical means and separated from the nuclear fuel assembly 6. In the above embodiment, the case where the control rod 103 of the control rod cluster 10 is inserted into the nuclear fuel assembly 6 has been described. However, the present invention is not limited to this, and other non-nuclear fuel core components such as a burnable poison assembly may be used. Is also applicable. Further, in the above embodiment, a new nuclear fuel assembly 6 has been described.
The present invention is not limited to this, and it is needless to say that the present invention can be applied to a case where a control rod cluster is inserted into a used nuclear fuel assembly.

[0011]

As described above, according to the first aspect of the present invention,
Is a jig used when inserting a non-nuclear fuel core component such as a control rod cluster or a burnable poison assembly into a nuclear fuel assembly, and a frame detachably provided on an upper portion of the nuclear fuel assembly, it to the inner surface adjacent of this frame body
A pair of guide members provided and provided with a number of guide grooves for engaging and disengaging with the non-nuclear fuel core component, detachably mounted on the upper portion of the frame, and engaging with and disengaging from the non-nuclear fuel core component. And a guide member having a large number of guide grooves formed therein.Therefore, the frame is mounted on the upper portion of the nuclear fuel assembly, and the lower portion of the non-nuclear fuel core structure is engaged with the guide groove of the guide member. In a state where the position of the lower portion of the non-nuclear fuel core component is regulated, the non-nuclear fuel core component is lowered and inserted into the space formed by the guide grooves of both guide members of the frame, and By mounting the member on the upper part of the frame, the nuclear fuel assembly and the non-nuclear fuel core component can be reliably aligned, and the non-nuclear fuel core component can be smoothly inserted into the nuclear fuel assembly. it can. According to a second aspect of the present invention, the guide groove of the guide member or the guide groove of the guide member is set to have a length that fits at least with the rod-shaped bodies of the non-nuclear fuel core constituting body arranged in a line. Therefore, by fitting the rods arranged in a line in the non-nuclear fuel core structure with the guide grooves of the guide member or the guide grooves of the guide member, the position of each rod in the non-nuclear fuel core structure can be more accurately determined. The nuclear fuel assembly can be well matched, and the non-nuclear fuel core component can be reliably inserted into the nuclear fuel assembly. Furthermore, a third aspect of the present invention provides a frame member detachably provided on an upper portion of a nuclear fuel assembly, and a pair of guide members each having a plurality of guide grooves provided on adjacent inner surfaces of the frame body. And a guide member detachably mounted on the upper portion of the frame body and having a guide member having a number of guide grooves, wherein the insertion device for inserting a non-nuclear fuel core component into a nuclear fuel assembly, A non-nuclear fuel core component elevating means which is detachably provided on the non-nuclear fuel core component, and which raises and lowers the non-nuclear fuel core component, and a frame vertical means which is provided on the frame and moves the frame up and down; A guide member moving means provided on the guide member and engaging and disengaging a guide groove of the guide member with the non-nuclear nuclear reactor core component; and provided on the guide member,
And a guide member moving means for engaging and disengaging the guide groove of the guide member with the non-nuclear nuclear reactor core structure. Therefore, a pair of guide members in the frame are set at predetermined positions by the guide member moving means. In this state, the frame positioned above the nuclear fuel assembly is lowered by the frame vertical means, and is mounted on the upper portion of the nuclear fuel assembly, and then the guide member is moved by the guide member moving means, whereby the non-nuclear fuel core configuration is formed. While engaging the lower part of the body, lowering the non-nuclear fuel core component by non-nuclear fuel core component elevating means,
The lower part of the non-nuclear fuel core structure is inserted into the space formed by the two guide members of the frame, and the guide member is mounted on the upper part of the frame. Then, the guide member is moved by the guide member moving means to be separated from the non-nuclear fuel core structure, and the guide member is moved by the guide member moving means to release the engagement with the non-nuclear fuel core structure. In this state, the non-nuclear fuel core component is lowered by the non-nuclear fuel core component elevating means and completely inserted into the nuclear fuel assembly, and finally, the frame is lifted from the top of the nuclear fuel assembly by the frame vertical means. By removing the nuclear fuel assembly, the non-nuclear fuel core component can be easily inserted into the nuclear fuel assembly, and automation can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a rod holding state according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a rod opened state of FIG. 1;

FIG. 3 is a perspective view showing a state where a guide jig is to be mounted on a nuclear fuel assembly.

FIG. 4 is a perspective view showing a state where the lower part of the control rod is about to be inserted into a guide jig.

FIG. 5 is a perspective view showing a state where a lower portion of a control rod is inserted into a nuclear fuel assembly.

FIG. 6 is a perspective view showing a guide member and a state in which engagement between the guide member and a control rod is released.

FIG. 7 is a perspective view showing a state where a control rod insertion operation is completed.

FIG. 8 is a front view showing a nuclear fuel assembly.

FIG. 9 is a front view showing a control rod cluster.

FIG. 10 is a front view showing a burnable poison aggregate.

[Explanation of symbols]

 Reference Signs List 6 Nuclear fuel assembly 10 Control rod cluster 11 Burnable poison assembly 20 Guide jig 21 Frame 22 Guide member 30 Guide member 103 Control rod 111 Burnable poison rod 214 Notch 220 Guide groove 300 Convex portion 301 Guide groove

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shoichi Muraoka 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Nuclear Service Engineering Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB G21C 19/19 G21C 17/06 G21C 21/00

Claims (3)

(57) [Claims] 1. A jig used for inserting a non-nuclear fuel core component into a nuclear fuel assembly, comprising: a frame detachably provided on an upper portion of the nuclear fuel assembly; and a jig provided on an inner surface adjacent to the frame. A pair of guide members, each provided with a plurality of guide grooves for engaging and disengaging the non-nuclear fuel core component, and being detachably mounted on an upper portion of the frame, and engaging with and disengaging from the non-nuclear fuel core component; And a guide member having a plurality of guide grooves formed therein. 2. The guide groove of the guide member or the guide groove of the guide member is set to have a length that fits at least with the rods arranged in a line of the non-nuclear nuclear reactor core structure. The jig for inserting a non-nuclear fuel core component described in the above. 3. A frame detachably provided on an upper part of the nuclear fuel assembly, a pair of guide members provided on inner surfaces adjacent to the frame and having a plurality of guide grooves, respectively, and the frame And a guide member having a plurality of guide grooves, which is removably mounted on an upper portion of the nuclear fuel assembly, and wherein the non-nuclear fuel core component is inserted into the nuclear fuel assembly. A non-nuclear fuel core component elevating means for removably provided to the non-nuclear fuel core component, and a frame vertical means provided on the frame and raising and lowering the frame, and the guide member And a guide member moving means for engaging and disengaging the guide groove of the guide member with the non-nuclear fuel core component, and provided on the guide member,
And a guide member moving means for engaging and disengaging the guide groove of the guide member with the non-nuclear fuel core component. An insertion device having a jig for inserting a non-nuclear fuel core component.