JP2016014621A - Control rod storage facility, and storage method of control rod using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control rod storage facility having a comparatively simple structure, and excellent in earthquake resistance, while utilizing effectively a space in a fuel storage pool; and to provide a storage method of the control rod using the same.SOLUTION: A control rod storage facility used when storing a control rod 10 in a fuel storage pool includes a pallet 1 for storing the control rod 10. The pallet 1 is constituted in a recessed shape having a bottom plate 2 and a side plate 3, and stores the control rod 10 in the lateral attitude. Further, the pallet 1 is constituted stackably.

Description

  The present invention relates to a control rod storage facility for storing a control rod, particularly for a boiling water nuclear power plant, and a storage method for storing the control rod in the control rod storage facility.

  In boiling water nuclear power plants, if control rods are taken out of the core for inspection or other purposes, they must be returned to the core and reused. The rods need to be stored and stored in the fuel storage pool. The deep water area of the fuel storage pool is mainly used for fuel body storage, and the shallow water area with relatively large space in the fuel storage pool is effectively used as control rod storage and storage space. Things have been done.

  In the conventional control rod storage facility, the control rod to be stored and stored has a structure in which the control rod is inserted horizontally into a storage hanger fixed to the side wall in the storage pool (see Patent Document 1) or horizontally in the horizontal direction. Has been adopted to be inserted into the storage rack (see Patent Document 2).

Japanese Utility Model Publication No.59-98399 Japanese Examined Patent Publication No. 61-48877

  However, the control rod storage facility (storage hanger) described in Patent Document 1 has a structure in which an upper handle portion of the control rod is suspended from a hanger member of the storage hanger for storage and storage. This hanger member must hold the entire mass of the hanger member, and the hanger member has a space limitation with the upper handle portion of the control rod and a space limitation with the tools for horizontal storage. Therefore, it is difficult to simply increase the size of the hanger member. Moreover, when the acceleration in the vertical direction is particularly large among the earthquake resistance conditions applied to the equipment, there is a problem that the stress generated in the hanger member is excessive, and the earthquake resistance and strength as the equipment cannot be secured.

  In addition, in the control rod storage facility (storage rack) described in Patent Document 2, it is necessary to insert the control rod into the rack from the side. The gate-shaped component is opened in advance, and the same component is inserted after the control rod is inserted. There is a problem that the structure of the storage rack becomes complicated in addition to the complicated preparation and restoration work before and after the storage that it is necessary to close.

  The present invention solves the above-described problems of the prior art, and is a control rod storage facility and a control rod storage that are relatively simple in structure and excellent in earthquake resistance while effectively utilizing the space in the fuel storage pool. An object of the present invention is to provide a control rod storage method using equipment.

  The present invention is a control rod storage facility for use in storing control rods in a storage pool, comprising a storage member for storing the control rods, wherein the storage member stores the control rods in a lateral orientation. It is characterized by doing.

  ADVANTAGE OF THE INVENTION According to this invention, the space in a fuel storage pool can be used effectively, and the storage method of the control rod using the control rod storage equipment using the control rod storage equipment which is comparatively simple, and was excellent in earthquake resistance can be provided. .

It is a perspective view which shows the pallet of 1st Embodiment. It is a side view which shows schematic structure of a control rod. It is a top view which shows a pallet. It is a top view which shows the modification of a pallet. It is a perspective view which shows the state which stacked the pallet. It is sectional drawing which shows arrangement | positioning of the control rod in a pallet. It is a pallet arrangement | positioning figure in a fuel storage pool. It is process drawing which shows the storage method which stores a control rod in a pallet. It is process drawing which shows the storage method of the control rod in the case of stacking pallets. It is process drawing which shows another storage method of the control rod in the case of stacking pallets. It is a figure explaining the effect when the storage method shown in FIG. 9 is employ | adopted. The pallet of 2nd Embodiment is shown, (a) is a partially-omission perspective view which shows the inside of a pallet, (b) is a figure explaining the accommodation method of a control rod. It is sectional drawing which shows arrangement | positioning of the control rod in the pallet of 3rd Embodiment.

  Hereinafter, the control rod storage facility according to the present embodiment will be described with reference to the drawings. This control rod storage facility includes a pallet 1 (storage member), and stores and stores the control rod 10 (see FIG. 2) by effectively utilizing the empty space in the fuel storage pool P (see FIG. 7). It is something that can be done.

(First embodiment)
FIG. 1 is a perspective view showing a pallet according to the first embodiment.
As shown in FIG. 1, the pallet 1 can store a plurality of control rods 10 (see FIG. 2), and is configured to have a concave shape so as to have an upper opening 1 a by a bottom plate 2 and a side plate 3. Is. In addition, the pallet 1 includes a partition plate 4 that divides and arranges the control rods 10, support members 5a and 5b that support the control rods 10, suspension brackets 6 that suspend the pallet 1, and guide pins 7a and 7b for connection ( A guide portion) and positioning holes 8a and 8b (positioning portions).

  The pallet 1 is made of, for example, a stainless alloy, and is configured by combining the bottom plate 2 and the side plate 3 by welding. The side plate 3 includes a pair of long side plate portions 3a and 3a extending along the axial direction of the control rod 10 (see FIG. 2) and a pair of short side plate portions 3b extending in a direction orthogonal to the long side plate portion 3a. , 3b have a rectangular shape in plan view (see FIG. 3).

  On the upper surface of the longitudinal side plate portion 3a, connecting guide pins 7a, 7a are provided so as to protrude upward. Similarly, on the upper surface of the short side plate portion 3b, a connecting guide pin 7b is projected upward. In addition, about the number of guide pins 7a and 7b, it can change suitably.

  A positioning hole 8a is formed in the lower surface of the long side plate portion 3a at a position corresponding to the guide pin 7a in the vertical direction. A positioning hole 8b is formed on the lower surface of the short side plate portion 3b at a position corresponding to the guide pin 7b in the vertical direction. It should be noted that the number of positioning holes 8a and 8b can be changed as appropriate according to the number of guide pins 7a and 7b.

  FIG. 2 is a side view showing a schematic structure of the control rod. FIG. 2 is a schematic diagram showing an example of a control rod used in a boiling water nuclear power plant, and in particular, a control rod 10 for an improved boiling water nuclear power plant. Although not illustrated and described here, the basic structure and the like of the control rod for a normal boiling water nuclear power plant that is not an improved boiling water nuclear power plant is the same, and the present invention relates to either type. It is also applicable to.

  As shown in FIG. 2, the control rod 10 has a structure in which an upper structure portion 11, a lower structure portion 12, and a neutron absorption portion 13 sandwiched between the upper structure portion 11 and the lower structure portion 12 are integrated. ing. The upper structure part 11 has a handle part 11 a that can be hung by hanging the control rod 10. The lower structure portion 12 has a cylindrical connector (socket) 12a for connecting to a drive portion that drives the control rod 10 (inserts into or pulls out from the core).

  The neutron absorber 13 includes a blade 13a in which a neutron absorbing material is housed. The blade 13a is composed of four blades and is combined in a cross shape (the shape of the sign “+”, the shape of a + sign). Similarly, the upper structure portion 11 and the lower structure portion 12 are configured to have a cross shape.

FIG. 3 is a plan view showing the pallet.
As shown in FIG. 3, the bottom plate 2 is arranged so as to span between the rectangular frame portion 2 a arranged along the long side plate portion 3 a and the short side plate portion 3 b and the frame portion 2 a on the long side plate portion 3 a side. And a plurality of plate portions 2b, 2b, 2b. Thereby, a lattice-shaped gap S <b> 1 is formed in the bottom plate 2. Thus, by forming the lattice-shaped gap S1 in the bottom plate 2, the pallet 1 can be reduced in weight. In the present embodiment, the case where four rectangular openings are formed has been described as an example. However, one, two, three, or five or more openings may be formed. .

  A plurality of partition plates 4 are provided, and extend along the long side plate portion 3a between the short side plate portions 3b and 3b. Further, the partition plate 4 is formed in an elongated plate shape, and both end portions 4a in the longitudinal direction are fixed to the inner surface 3b1 of the short side plate portion 3b, the upper surface 2a1 of the frame portion 2a, and the upper surface 2b1 of the plate portion 2b by welding or the like. Has been. By providing the partition plate 4 in this way, the strength of the pallet 1 can be increased. The height H1 of the partition plate 4 (see FIG. 1) is lower than the side plate 3 of the pallet 1 (for example, about half the height of the partition plate 4), thereby reducing the weight while reinforcing the pallet 1. it can. However, it does not prevent the height H1 of the partition plate 4 from being the same as that of the side plate 3.

  Thus, the pallet 1 has an elongated storage space in which the control rod 10 (see FIG. 2) is stored between the partition plate 4 and the partition plate 4 and between the partition plate 4 and the long side plate portion 3a. It is formed. In this storage space, the control rod 10 (see FIG. 2) is stored so as not to contact the bottom plate 2, the side plate 3, and the partition plate 4. In addition, it is preferable that the grid | lattice-like clearance gap S1 is formed over the bottom face of each storage space. Thereby, the resistance of the cooling water when moving the pallet 1 can be reduced.

  The support member 5a supports the upper structure portion 11 of the control rod 10 during storage and storage, while the support member 5b supports the lower structure portion 12 of the control rod 10, and the support members 5a and 5b. Is provided in each storage space partitioned by the partition plate 4 and partitioned by the partition plate 4 and the long side plate portion 3a.

  Further, the bottom plate 2 of the pallet 1 may constitute a mesh-like gap S2 as shown in FIG. 4 in place of the arrangement that forms the lattice-like gap S1. Even in such a shape, the weight of the pallet 1 can be reduced and the resistance of the cooling water can be reduced.

FIG. 5 is a perspective view showing a state in which pallets are stacked.
As shown in FIG. 5, the hanging metal fitting 6 is fixed to the outer surface of the long side plate portion 3a by welding or the like. Further, the hanging metal fittings 6 are formed at two locations on each of the long side plate portions 3a, and the pallet 1 is suspended at a total of four points.

  In addition, the hanging metal fitting 6 is formed with a hole 6a for hooking a hook (not shown) of a crane at the tip (upper end) of the hook portion 6b. As described above, since the tip (hole 6a) of the hanging bracket 6 protrudes above the side plate 3, a hook (not shown) can be easily hooked on the hanging bracket 6.

  In FIG. 5, the state in which the pallets 1 are stacked in three stages is described as an example. However, depending on the space in the fuel storage pool P (see FIG. 7) and the number of control rods 10 to be stored and stored. It can be changed as appropriate, and may be one stage, two stages, or four or more stages.

  In the present embodiment, the control rod 10 is stored in the pallet 1 in a horizontal posture (horizontal state). That is, one control rod 10 is stored in each space partitioned by the partition plate 4. In addition, in this embodiment, although the space (storage space) which accommodates the control rod 10 is divided into four, it may be three or less or may be five or more.

  When stacking the pallets 1, the guide pins 7a, 7b of the pallet 1 positioned at the lower level are inserted into the positioning holes 8a, 8b of the pallet 1 positioned at the upper level, so that the side plates 3 of the pallet 1 are connected to each other. It overlaps vertically.

  Moreover, since the hanging bracket 6 is located outside the outer surface of the long side plate portion 3a, the hanging bracket 6 of the lower pallet 1 does not interfere with the upper pallet 1 when the pallets 1 are stacked. Moreover, since the engagement strength of each pallet 1 is raised by the hanging metal fitting 6 so that the stacked pallets 1 do not collapse, the earthquake resistance can be improved.

  In the present embodiment, when stacking the pallets 1, the pallet 1A (1) located at the lowermost stage has the integrally formed fixing portion 9 as a floor in the fuel storage pool P (see FIG. 7). You may make it fix to the anchor bolt B formed in the surface F (refer FIG. 7). Thereby, earthquake resistance can be improved.

  In the present embodiment, the upper opening 1a of the pallet 1 located at the top may be closed with the lid 20. The lid 20 is configured by forming through holes 21a and 21b through which guide pins 7a and 7b are inserted in a peripheral portion of a rectangular plate made of stainless steel. As a result, even if foreign matter falls into the fuel storage pool P, foreign matter can be prevented from entering the pallet 1.

FIG. 6 is a cross-sectional view showing the arrangement of the control rods in the stacked pallets.
As shown in FIG. 6, in the pallet 1, the control rod 10 is laid down (sideways, and the four blades 13 a (see FIG. 2) of the control rod 10 are either in the vertical direction or the horizontal direction. Are supported by the supporting members 5a and 5b in a cross-shaped (cross-shaped) posture. This support member 5a is formed by forming a concave groove 5a1 in a square plate-like member in a side view, and a downward plate portion 11b of the upper structure portion 11 of the control rod 10 is inserted into the groove 5a1 so that a horizontal plate Since the portions 11c and 11c are in contact with the upper edges 5a2 and 5a2 of the support member 5a, the upper structure portion 11 is supported by the support member 5a. As for the lower structure portion 12 of the control rod 10, similarly to the upper structure portion 11, the downward plate portion of the lower structure portion 12 is inserted into the groove 5 b 1 (see FIG. 3) of the support member 5 b, and the horizontally oriented plate. The lower structure portion 12 is supported by the support member 5b because the portion contacts the upper edge portions 5b2 and 5b2 (see FIG. 3) of the support member 5b. Thereby, the control rod 10 is supported at two points of the support members 5a and 5b in the pallet 1 in a horizontal posture.

  Thus, by supporting the control rod 10 at two points, it is possible to disperse the load applied to the support portion. Therefore, the control rod 10 is more resistant to earthquakes than the case where the control rod 10 is supported at one point in the vertical orientation. It can be improved. Further, since the center of gravity of the control rod 10 can be lowered by supporting the control rod 10 in the horizontal orientation, the control rod 10 can be supported more stably than when the control rod 10 is supported in the vertical orientation.

  Next, a storage method for storing and storing the control rod 10 in the pallet 1 will be described with reference to FIGS. FIG. 7 is a layout diagram of pallets in the fuel storage pool, FIG. 8 is a process diagram illustrating a storage method for storing control rods in the pallet, and FIG. 9 is a process diagram illustrating a control rod storage method when stacking pallets. FIG. 10 is a process diagram showing another control rod storage method when stacking pallets, and FIG. 11 is a diagram for explaining the effect when the storage method shown in FIG. 9 is adopted.

  As shown in FIG. 7, the fuel storage pool P is provided on the side of the reactor well 101. Further, when storing the control rod 10, the fuel storage pool P is connected to the reactor well 101 via an openable / closable water channel (not shown). The control rod 10 is handled at a predetermined depth DW or less from the water surface of the fuel storage pool P in order to avoid the influence of radiation. For example, the pallet 1 is configured to be stacked on a floor surface (bottom surface) F that is formed one level higher than the fuel rack 102 in which the fuel assembly is accommodated (shallow water depth).

  As shown in FIG. 8, a hook 52 connected to a wire rope 51 of a control rod handling device 50 attached to a crane (not shown) is suspended, and an opening formed in the handle portion 11a of the control rod 10 is suspended. The hook 52 is inserted and hooked. Then, the wire rope 51 is wound up, the control rod 10 is raised in the vertical orientation, and transferred to the pallet 1 installed in the fuel storage pool P.

  Then, while holding the control rod 10 in the vertical orientation, the gripping tool 54 connected to the wire rope 53 of the control rod handling device 50 is lowered to the position of the lower structure portion 12 of the control rod 10 to grip the lower structure portion 12. Grab at 54. Then, while maintaining the height of the gripper 54, the wire rope 51 is lowered, and as indicated by the arrow A, the control rod 10 is changed from the vertical posture to the horizontal posture (a posture parallel to the pallet 1, a horizontal state). . As a result, the control rod 10 is in a suspended state above the pallet 1. Then, as indicated by the arrow B, the wire ropes 51 and 53 are both lowered, the control rod 10 is lowered into the pallet 1 in the horizontal posture, and the upper structure portion 11 and the lower structure portion 12 of the control rod 10 are moved to the pallet 1 respectively. The supporting members 5a and 5b provided inside are supported. In this way, the operation of storing the control rod 10 in the pallet 1 is repeated.

Further, when the pallets 1 are stacked and stored / stored, the following two storage methods shown in FIGS. 9 and 10 can be employed. 9 and 10 show a state where the control rod 10 is already stored in the first stage pallet 1A to the full storage capacity.
The storage method shown in FIG. 9A is a case where the control rod storage work area R1 and the pallet stacking work area R2 are separated. The control rod storage work area R1 is a place used when the control rods 10 are stored in the pallet 1. The pallet stacking work area R2 stacks the pallets 1 and is stored in the pallet 1. Is a place to store

  That is, as shown in FIG. 9B, in the control rod storage work area R1, the control rod 10 is stored to the full capacity in the pallet 1B (1) by the storage method described in FIG. As shown, the pallet 1B is stacked on a pallet 1A (1) in the pallet stacking work area R2 using a crane (not shown) (see a two-dot chain line). In this way, the control rod storage work area R1 performs the operation of storing the control rod 10 on the pallet 1, and the pallet stacking work area R2 performs the operation of stacking and storing the pallets 1 storing the control rods 10. .

  When the first pallet 1A is fixed to the floor surface F, the control rod 10 is stored to the full capacity of the pallet 1A fixed to the floor surface F of the pallet stacking work area R2. The operation of accommodating the control rod 10 is performed from the first stage pallet 1B in the control rod accommodation work area R1.

  Further, the storage method shown in FIG. 10 is a case where the control rod storage work area R1 and the pallet stacking work area R2 are in the same place (area R3). That is, in the area R3, the control rod 10 is stored in the first stage pallet 1A to the full capacity, and then the empty pallet 1B is stacked on the pallet 1A, and the control rod 10 is stored in the pallet 1B. Thus, space saving can be achieved by making the control rod storage work area R1 and the pallet stacking work area R2 the same place.

  By the way, the storage operation of the control rod 10 needs to be performed at a position deeper than the water depth DW of the fuel storage pool P (see FIGS. 7 and 11). Therefore, as shown in FIG. 11 (a), when the control rod storage work area R1 and the pallet stacking work area R2 are stored in the same place (area R3), the work for storing the control rod 10 is performed on the pallet 1. Since the new pallet 1 is stacked after the control rod 10 is stored to the full storage capacity, the water depth at which the control rod 10 is stored in the pallet 1 gradually becomes shallower.

  On the other hand, as shown in FIG. 11B, when the control rod storage work area R1 and the pallet stacking work area R2 are separated, the control rod 10 is placed on the pallet 1 in the control rod storage work area R1. Since the storage work is performed and the pallet 1 storing the control rod 10 to the full storage capacity is moved to the pallet stacking work area R2, the water depth at which the control rod 10 is stored in the pallet 1 is always the same.

  Therefore, since the pallet 1 storing the control rods 10 can be stacked close to the water depth DW, the pallet 1 storing the control rods 10 can be efficiently arranged.

  As described above, the control rod storage facility according to the first embodiment includes the pallet 1 that stores the control rod 10, and the control rod 10 is stored in the sideways posture in the pallet 1. Thereby, since the control rod 10 can be stored at a relatively shallow position, the space in the fuel storage pool P can be used effectively. Moreover, since the control rod storage facility is in the form of a pallet, the structure is relatively simple. Furthermore, since the control rod 10 can be held in a lateral orientation, it can be made excellent in earthquake resistance.

  Moreover, in this embodiment, since the pallet 1 has the bottom plate 2 and the side plate 3 and is configured in a concave shape, the control rod 10 can be prevented from falling off the pallet 1.

  Moreover, in this embodiment, when the pallet 1 has the grid | lattice-like gap | interval S1 and the mesh-shaped gap | interval S2, the resistance of water is reduced when moving the pallet 1 which accommodated the control rod 10 in the fuel storage pool P. The control rod handling device 50 that suspends the pallet 1 can be downsized.

  Moreover, in this embodiment, since the hanging metal fitting 6 which suspends the pallet 1 on the side plate 3 is provided, the moving operation of the pallet 1 can be facilitated.

  Moreover, in this embodiment, the pallet 1 can be reinforced by providing the pallet 1 with the partition plate 4.

  In the present embodiment, the guide pins 7a and 7b are formed at the top of the pallet 1 and the positioning holes 8a and 8b for positioning the guide pins 7a and 7b are formed at the bottom of the pallet 1. It can be stacked, and the space can be used effectively.

  Moreover, in this embodiment, by providing the lid 20 that closes the upper opening 1 a of the uppermost pallet 1, it is possible to prevent foreign matter from entering the pallet 1.

  Further, in this embodiment, the pallet 1 includes support members 5a and 5b that support the control rod 10 in a + sign posture so that the pallet 1 in a state in which the control rod 10 is accommodated is moved up and down in the fuel storage pool P. Since the water received by the horizontal (sideways) blades 13a, 13a of the control rod 10 can be easily released to the outside (both left and right) and the resistance of the water can be reduced. 50 downsizing is possible.

(Second Embodiment)
FIG. 12 shows a pallet according to the second embodiment, (a) is a perspective view showing a support member, and (b) is a view for explaining a method of storing control rods. The pallet 30 (storage member) of the second embodiment is a support member 5c instead of the support member 5b of the pallet 1 of the first embodiment, and the other configurations are the same as those of the first embodiment. The same reference numerals are assigned and duplicate descriptions are omitted.

  As shown to Fig.12 (a), the supporting member 5c is comprised combining the board part 5d and board part 5e, 5e. The plate portion 5d is formed by forming a concave groove portion 5d1 in the square plate portion, similarly to the support member 5a. The plate portions 5e and 5e are configured to extend in parallel to each other from the plate portion 5d toward the side opposite to the support member 5a. A width W1 between the plate portions 5e and 5e is such that a part of the cylindrical portion at the lower end of the socket 12a of the control rod 10 can be inserted.

  As shown in FIG. 12 (b), the control rod 10 is lowered to the support member 5c of the pallet 1 in the vertical orientation, and the socket 12a of the lower structure portion 12 is inserted between the plate portions 5e. The lower edge portion of the lower structure portion 12 is brought into contact with the upper edge portion 5e1. Then, as indicated by an arrow D, the position where the lower end of the lower structure 12 abuts is rotated as a fulcrum. At this time, the control rod 10 can be rotated by the plate portion 12b of the lower structure portion 12 facing the support member 5a side entering the groove portion 5d1 (see FIG. 12A). And when the horizontal plate part 12c of the lower structure part 12 touches the upper edge part 5e1, the control rod 10 changes from the vertical position to the horizontal position (position parallel to the pallet 1, horizontal state). In this way, the operation of storing the control rod 10 in the pallet 1 is repeated.

  By providing such a support member 5c, the control rod handling device 50 for storing the control rod 10 in the pallet 1 can eliminate the need for the gripping tool 54 (see FIG. 8) for grasping the lower structure portion 12, and the control rod handling device. 50 can be simplified.

(Third embodiment)
FIG. 13 is a cross-sectional view showing the arrangement of control rods in the pallet of the third embodiment.
The pallet 40 shown in FIG. 13 includes a support member 5f, and the control rod 10 is cross-shaped by the support member 5f so that the four blades 13a (see FIG. 2) of the control rod 10 are arranged in an oblique direction. The control rod 10 is held in an X-shaped posture rotated 45 degrees from the posture. The support member 5 f is formed of a right-angled isosceles triangular member in a side view, and supports the control rod 10 by two plate portions forming an angle of 90 degrees of the upper structure portion 11 of the control rod 10.

  Thus, by supporting the control rod 10 in the X-shaped posture by the support member 5f, the height H3 from the bottom plate 2 of the control rod 10 is the height when the control rod 10 is supported in the cross-shaped posture. It can be made lower than H4 (see FIG. 6), the number of pallets 1 can be increased, and the space can be used more effectively.

  The present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. For example, in the present embodiment, the case where the pallet 1 includes the bottom plate 2 and the side plate 3 has been described as an example. However, even if the pallet 1 can be stacked by standing pillars at four corners of a rectangular plate material. Good.

  Further, instead of the support member 5c shown in FIG. 12, a support member having a rotation mechanism may be used. Further, in place of the fixing portion 9 integrally formed with the lowermost pallet 1 shown in FIG. 5, a fixing gantry for fixing to the floor surface F is provided under the lowermost pallet 1 so that the lowermost pallet 1 is attached. It may be fixed. Further, the posture of holding the control rod 10 is not limited to a cross shape (shape of “+”) or a cross mark (shape of “x”), but is held in other postures. May be.

1,30,40 Pallet (storage member)
DESCRIPTION OF SYMBOLS 1a Top opening 2 Bottom plate 3 Side plate 3a Long side plate part 3b Short side plate part 4 Partition plate 5 Support member 6 Hanging metal fitting 7a, 7b Guide pin (guide part)
8a, 8b Positioning hole (positioning part)
DESCRIPTION OF SYMBOLS 10 Control rod 11 Upper structure part 11a Handle part 12 Lower structure part 13 Neutron absorption part 20 Lid P Fuel storage pool (storage pool)
R1 Control rod storage work area R2 Pallet stacking work area (storage member stacking work area)
S1 Lattice-like gap S2 Mesh-like gap

Claims (13)

A control rod storage facility used when storing control rods in a storage pool,
A storage member for storing the control rod;
The control rod storage facility, wherein the storage member stores the control rod in a horizontal orientation.   2. The control rod storage facility according to claim 1, wherein the storage member has a bottom plate and a side plate erected on an outer periphery of the bottom plate and is configured in a concave shape.   The control rod storage facility according to claim 2, wherein the storage member has a lattice-like or mesh-like gap on the bottom plate side.   4. The control rod storage facility according to claim 2, wherein the side plate includes a hanging bracket that suspends the storage member. 5. The storage member is configured to store a plurality of the control rods,
The control rod storage facility according to any one of claims 2 to 4, wherein the storage member includes a partition plate that is partitioned into a plurality of spaces. A guide part for connection is formed on the upper part of the storage member,
The control rod storage according to any one of claims 2 to 5, wherein a positioning portion for positioning a guide portion of the storage member positioned in the lower stage is formed in a lower portion of the storage member. Facility.   The control rod storage facility according to any one of claims 2 to 6, wherein the uppermost storage member includes a lid that closes an upper opening of the storage member.   The control rod storage facility according to any one of claims 1 to 7, wherein the storage member includes a support member that holds the control rod in a + sign posture.   The control rod storage facility according to any one of claims 1 to 7, wherein the storage member includes a support member that holds the control rod in an X-shaped posture. A storage method for storing control rods in the control rod storage facility according to any one of claims 1 to 9,
A control rod storage method using a control rod storage facility, wherein the single storage member storing the control rod is stored. A storage method for storing control rods in the control rod storage facility according to any one of claims 1 to 9,
A method for storing control rods using a control rod storage facility, wherein the storage members storing the control rods are stored in two or more layers.   The control rod is stored in a storage capacity of the storage member, the empty storage member is stacked thereon, and the control rod is stored and stored in the stacked storage member. A control rod storage method using the control rod storage facility according to claim 11.   The control rod storage work area for storing the control rods in the storage member and the storage member stacking work area for storing the storage members storing the control rods in an overlapping manner are provided separately. A control rod storage method using the control rod storage facility according to claim 11.

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