JPH05333193A - Multi-function handling device in reactor - Google Patents

Abstract

PURPOSE:To shorten the working time without requiring replacement of handling tools each time by installing multiple cranes provided with handling tools having different uses respectively on a fuel replacing machine on a travel rail. CONSTITUTION:A fuel replacing machine 3 installed on a travel rail in a reactor building and installed with a fuel holder 10 is installed with the first crane 101a fitting the handling tool 201a of a reactor coolant recirculating pump (RIP), the second crane 101b fitting the handling tool 201b of a reactor neutron flux monitor (ICM), the third crane 101d fitting the handling tool 201c of a control rod(CR), and the fourth crane 101c fitting the handling tool 201c of a fuel support(FS). The RIP handling tool 201a, ICM handling tool 201b, FS handling tool 201c, and CR handling tool 201d can be handled by the dedicated cranes during the work in the reactor. The handling tools are not required to be replaced for each work after they are fitted to the dedicated cranes in advance, and the working time in the reactor can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a boiling water nuclear power plant (BWR) and an improved boiling water nuclear power plant (ABW).
The present invention relates to a multifunctional reactor handling device suitable for reactor coolant recirculation pump handling work, reactor neutron flux monitor handling work, and control rod handling work in the reactor handling work during the periodic inspection of R).

[0002]

2. Description of the Related Art In-core handling work carried out during periodic inspections of boiling water nuclear power plants (BWRs) and improved boiling water nuclear power plants (ABWRs) involves refueling work and inserts other than fuel. There is handling work.

For handling inserts other than fuel, the reactor coolant is forcibly circulated in the core to effectively take out the heat generated from the fuel assembly of the core and control the output of the reactor. Coolant recirculation pump (hereinafter referred to as RIP)
In-core neutron flux monitor (hereinafter referred to as ICM) that indicates the output state of the core based on the measured values of neutron flux
And the control rod (hereinafter referred to as CR) that controls the reactivity of the core and adjusts the power distribution.
RIP that handles RIP when handling P
A RIP gripping tool which is a handling tool, an ICM handling tool which handles an ICM when performing an ICM handling operation, an FS handling tool which handles a fuel support (hereinafter referred to as FS) when performing a CR handling operation, Using CR handling tools that handle and handle CR, each handling tool was hung from the auxiliary hoist of the refueling machine to perform the handling work.

As a conventional technique for handling the inserts other than the fuel, a technique for handling the ICM is disclosed in Japanese Patent Laid-Open No. 3-33698.
JP-A-60-21492 discloses a technique relating to CR handling. Further, a technique for simultaneously handling PWR fuel and CR is disclosed in Japanese Patent Laid-Open No. 3-33698.

Further, in Japanese Unexamined Patent Publication No. 3-221897, a dolly of a fuel exchange machine is divided into a dolly for refueling and a lifting machine part for handling inserts, and a refueling work and an insertion by the lifting machine part are performed. A technique has been disclosed in which both the handling work and the handling work can be separated when they are congested, and at the same time, the lifting machine portion also has a fuel replacement function.

[0006]

[Problems to be Solved by the Invention]
IP handling work, ICM handling work, and CR handling work are critical works in the regular inspection process, and the operation and soundness of the process and the nuclear power plant are greatly affected, so delays in handling work are not allowed. .. Therefore, in the above-mentioned in-furnace handling work, shortening the working time (shortening the process) is the most important work.

However, when the RIP handling work, the ICM handling work, and the CR handling work in the furnace handling work are performed, the RIP handling tool, the ICM handling tool, the FS handling tool, and the CR handling tool are refueled each time. Each of the above-mentioned handling tools was attached to the tip of the auxiliary hoist, and was removed and replaced. However, each working time is required to replace the handling tool, and the accumulation of each working time has been a cause of prolonging the working time in the furnace.

Further, the above-mentioned Japanese Patent Laid-Open No. 3-33698 and Japanese Patent Laid-Open No.
60-21492, JP-A-3-33698, and JP-A-3-33698
Since the technology described in Japanese Patent No. 221897 can handle only the inserts other than the fuel one by one,
Again, as in the above case, the accumulation of the working time for each handling tool exchange has been a cause of extending the working time in the furnace.

An object of the present invention is to provide an RIP handling tool for handling inserts other than fuel in the reactor internal handling work, I
It is an object of the present invention to provide a multi-functional in-core handling apparatus that can reduce working time without having to replace handling tools such as CM handling tools, FS handling tools and CR handling tools each time.

[0010]

In order to achieve the above object, a multifunctional in-reactor handling device according to the present invention is installed so as to be able to travel on a traveling rail laid on an operation floor of a nuclear reactor power plant building. A reactor coolant that controls the power output of the reactor by forcibly circulating the reactor coolant inside the core on the refueling machine equipped with the fuel gripper to effectively take out the heat generated from the fuel assembly of the core. Reactivity of the first lifter to which the handling tool of the recirculation pump is attached, and the second lifting machine to which the handling tool of the in-core neutron flux monitor that indicates the output state of the core based on the neutron flux measurement value is attached A third lifting machine for mounting a control rod handling tool for controlling the fuel flow and adjusting the output distribution, and a fourth lifting machine for mounting a fuel support handling tool for grasping a fuel support that supports fuel in a correct position are installed. To.

Further, in order to achieve the above-mentioned object, the multi-functional in-core handling apparatus according to the present invention is provided in a core of a work table of an overhead crane installed on a ceiling of an operation floor of a nuclear reactor power plant. A first lifter for attaching a handling tool of a reactor coolant recirculation pump for forcibly circulating the reactor coolant and effectively extracting heat generated from the fuel assembly of the core to control the output of the reactor; The second lifting machine to which the handling tool of the in-core neutron flux monitor that indicates the output state of the core based on the measured value of the bundle is attached, and the handling tool of the control rod that controls the reactivity of the core and adjusts the power distribution. Install a third lift to attach and a fourth lift to attach a fuel support handler that grips the fuel support that holds the fuel in place.

In order to achieve the above object, the apparatus for handling a multifunctional reactor according to the present invention is provided with a dedicated traveling rail provided on the lower surface of the ceiling of the operation floor inside the reactor building of a nuclear power plant, and on the dedicated traveling rail. And a work carriage installed so that it can travel, and forcibly circulates the reactor coolant in the core provided on the work carriage to effectively take out heat generated from the fuel assembly of the core and control the output of the reactor. Attaching the handling equipment for the reactor coolant recirculation pump
And a second lifting machine for mounting a handling tool for an in-core neutron flux monitor, which is provided on the work carriage and indicates the output state of the core based on the measured value of the neutron flux, and is provided on the work carriage. A third lifting machine for attaching a control rod handling tool that controls the reactivity of the core to adjust the power distribution, and a fuel support handling tool that holds the fuel support that is provided on the work carriage to support the fuel in the correct position. And a fourth lifting machine to be attached.

Further, in order to achieve the above object, the multifunctional reactor handling apparatus according to the present invention can be separately run on a traveling rail for a refueling machine provided on an operation floor of a reactor building of a nuclear power plant. Installed on the dedicated work carriage, and forcibly circulates the reactor coolant in the core provided on the dedicated work carriage to effectively extract heat generated from the fuel assembly of the core and control the output of the reactor. The first lifting machine to which the handling tool of the reactor coolant recirculation pump is attached, and the handling tool of the in-core neutron flux monitor that is provided on the dedicated work carriage and indicates the output state of the core based on the measured value of the neutron flux. A second lifting machine to be mounted, a third lifting machine to be mounted on the dedicated work carriage for controlling the reactivity of the core for adjusting the power distribution, and a third lifting machine to be mounted on the dedicated work carriage. Vignetting and a fourth crane mounting the fuel support handling device to grab a fuel support for supporting the fuel in the correct position.

Further, in order to achieve the above object, the multi-functional furnace handling apparatus according to the present invention is a combination of two or three or all of the above-mentioned multi-functional furnace handling apparatuses.

[0015]

In the present invention configured as described above, the reactor coolant is mounted on the refueling machine installed so that it can travel on the traveling rail laid on the operation floor of the reactor building and the fuel gripping machine is installed. A first lifting machine to which a handling tool for a recirculation pump (RIP) is attached, a second lifting machine to which a handling tool for an in-core neutron flux monitor (ICM) is mounted, and a third tool to which a handling tool for a control rod (CR) is mounted By installing a lifting machine of No. 4 and a fourth lifting machine to which a handling tool for fuel support (FS) is attached, during the handling work in the reactor,
The RIP gripping tool, the ICM handling tool, the FS handling tool, and the CR handling tool can be handled by their respective dedicated lifting machines.
Therefore, if these handling tools are attached to the respective dedicated lifting machines at once in advance, it is not necessary to replace the handling tools for each handling work, and the handling time in the furnace can be shortened.

Further, a first lifting machine for attaching a handling tool of a reactor coolant recirculation pump (RIP) to a work table of an overhead crane installed on a ceiling of an operation floor of a reactor building, and a neutron in a reactor. By installing a second lifting machine to which the handling tool of the bundle monitor (ICM) and a third lifting machine to which the handling tool of the control rod (CR) is installed, handling in the reactor of the previous reactor in the same manner as above. RIP when working
The gripping tool, the FS handling tool, the CR handling tool, and the ICM handling tool can be handled by respective dedicated lifting machines. Therefore, if these handling tools are attached to the respective dedicated lifting machines at once in advance, it is not necessary to replace the handling tools for each handling work, and the handling time in the furnace can be shortened.

A dedicated traveling rail is provided on the ceiling of the operation floor in the reactor building, and a work carriage capable of traveling on the special traveling rail is installed, and a handling tool for a reactor coolant recirculation pump (RIP) is mounted on the work carriage. By installing a first lifter for attaching the neutron flux monitor, a second lifter for attaching the handling tool of the in-core neutron flux monitor (ICM), and a third lifter for attaching the handling tool of the control rod (CR) In the same way as above, during the handling work in the front reactor, the RIP grip,
The CR handling tool, the FS handling tool, and the ICM handling tool can be handled by respective dedicated lifting machines. Therefore, if these handling tools are attached to the respective dedicated lifting machines at once in advance, it is not necessary to replace the handling tools for each handling work, and the handling time in the furnace can be shortened.

Further, a dedicated work carriage installed separately so as to be able to run on the traveling rail for the refueling machine provided on the operation floor of the reactor building is provided, and the reactor coolant recirculation is carried on the dedicated work carriage. The first lifting machine to which the handling tool of the pump (RIP) is attached, and the in-core neutron flux monitor (IC
The second lifting machine to which the handling tool (M) is attached, and the control rod (C
By installing a third lifting machine to which the handling tool of R) is attached, during the handling work in the reactor in the same manner as above,
The RIP gripping tool, the CR handling tool, and the ICM handling tool can be handled by respective dedicated lifting machines. Therefore, if these handling tools are attached to the respective dedicated lifting machines at once in advance, it is not necessary to replace the handling tools for each handling work, and the handling time in the furnace can be shortened.

Among the inserts other than fuel, RIP is 1
There are 0 bodies, 112 pieces of ICM, and 216 pieces of CR. Of these, RIP is 2 pieces and ICM
16 units and 7 CR units are handled, but conventionally, these were handled one by one with each dedicated handling tool. That is, R
With the IP grip, handle two RIPs one by one,
The instrument handling tool handled 16 ICMs one by one, and the CR handling tool handled 7 CRs one by one.
In the present invention, a plurality of RIPs, ICMs, or CRs can be handled at once by combining two or three or all of the above multifunctional in-core handling devices. For example, the first lifting machine for attaching the measuring instrument handling tool installed on the refueling machine on the operation floor of the reactor building, and the measuring instrument handling tool installed on the workbench part of the ceiling crane on the operation floor of the reactor building. The first lifting machine to install the instrument and the instrument handling tool installed on the truck on the special traveling rail provided on the ceiling of the operation floor in the reactor building.
If you simultaneously use the lifting machine of No. 1 and the first lifting machine that installs the measuring instrument handling tool installed on the dedicated work vehicle separately installed on the traveling rail for the above-mentioned refueling machine, you can handle four at a time. be able to. Therefore, in addition to shortening the working time for exchanging each handling tool, the working time can be further shortened by being able to handle a plurality of identical inserts at the same time.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-functional road intake system according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a block diagram of the operation floor in the reactor building, and FIG. 2 shows a plan view of the operation floor. Figure 1
As shown in FIG. 1, an operation floor 2, a spent fuel pool 5, a reactor core 6, and a dryer / separator pool 7 are provided in the reactor building 1. Further, a ceiling crane 4 is installed on a traveling rail 4b laid on a beam 4a provided directly below the ceiling 1a of the operation floor 2. Further, as shown in FIG. 2, on the floor surface of the operation floor 2, a spent fuel pool 5, a core 6,
The traveling rail 2a is laid with a width wider than these widths so as not to interfere with each of the dryer / separator pool 7, and the fuel changer 3 is installed on the traveling rail 3a.

FIG. 3 shows the structure of the fuel changer 3. As shown in FIG. 3, the refueling machine 3 is provided with a traveling carriage 8 installed on the traveling rail 3a so as to travel freely, a traverse rail 3b installed on the traveling carriage 8 so as to be orthogonal to the traveling rail 3a, and a traverse rail 3b. It is composed of a transverse carriage 9 which is installed so as to travel freely above. The traverse vehicle 9 is provided with a double blade guide in which two blade guides having the same shape as the fuel assembly in the core are diagonally connected to each other, and the fuel grasper 10, the fuel assembly, and the RIP for handling the fuel assembly are provided. Auxiliary hoist 11 for handling inserts such as double blade guides, furnace internals, etc. other than IC, ICM and CR, RIP which is a RIP handling tool
A dedicated hoist 101a for attaching the grip 201a,
A dedicated hoist 101b for mounting the measuring instrument handling tool 201b which is an ICM handling tool, a dedicated hoist 101c for mounting the FS handling tool 201c, and a dedicated hoist 101d for mounting the CR handling tool 201d are installed. For simplicity, in FIG. 3, the RIP gripping tool 201a, the measuring instrument handling tool 201b, the FS handling tool 201c, and the CR handling tool 2 are shown.
01d is represented schematically. This dedicated hoist 101a,
101b, 101c, 101d constitute the handling apparatus in the multifunctional furnace according to the present embodiment. Also, dedicated hoist 101
a, 101b, 101c, 101d have RI in advance.
A P gripping tool 201a, a measuring instrument handling tool 201b, an FS handling tool 201c, and a CR handling tool 201d are attached, respectively. The auxiliary hoist 11 is rotatable around the mounting portion 11a, and the dedicated hoist 1 that constitutes the side of the traverse vehicle 9 on which the fuel grasper 10 is located and the multifunctional in-core handling device.
The work can be performed on either side of 01a, 101b, 101c, 101d, and when it is not necessary, it can be positioned on the side surface (above the traverse rail 3b) of the traverse carriage 9 as shown in FIG. Also, the carriage 8 and its arm 11b
Is provided at a position higher than the fuel grasper 10 and the dedicated hoists 101a, 101b, 101c, 101d constituting the handling device in the multi-functional furnace so as not to interfere with them.

Next, the dedicated hoist 101 as described above.
The handling of RIP, ICM, and CR by the multifunctional in-reactor handling device composed of a, 101b, 101c, and 101d will be described. First, the handling of RIP will be described. FIG. 4 shows the structure of the RIP, and FIG. 5 shows the RIP handling work. As shown in FIG. 4, the RIP 21 is attached to the lower portion of the reactor pressure vessel 22, and includes a pump casing 23, a motor 24, an impeller shaft 25, a diffuser stretch tube 26, and a stretch tube. −
It is composed of a butnut 27. In addition, a motor cover 28, a power cable 29, a power supply box 30, and a purge water injection pipe 31 are provided as accessories. This RI
P21 is to forcibly circulate the reactor coolant in the core to effectively take out the heat generated from the fuel assembly of the core and control the output of the reactor.

This RIP2 at the time of periodic inspection of the nuclear reactor
The inspection of 1 is mainly the motor 24, the impeller shaft 2
5. The diffuser stretch tube 26 is carried out. The motor 24 is taken out from the lower side of the pump casing 23, and the impeller shaft 25 and the diffuser stretch tube 26 are pump casings. -It is carried out by taking out from the inside of the sing 23 to the outside by the RIP holding tool 201a. This RIP gripping tool 201a is a dedicated hoist 101a installed on the fuel changer 3 that runs on the operation floor 2 (see FIG. 3).
Attached to. This embodiment is mainly effective for handling the impeller shaft 25.

Impeller shaft 25 of the RIP 21
As shown in FIG. 5, the procedure for removing the fuel is as follows. First, the traveling carriage 8 of the refueling machine 3 is caused to travel, and the traverse carriage 9 is traversed to the working position directly above the core 6 for exclusive hoisting. RIP gripper 201 attached to the tip of 101a
Let a come. Next, the impeller shaft 25 is grasped from the inside of the pump casing 23 by the RIP grasping tool 201a, the dedicated hoist 101a is wound up, and the impeller shaft 25 grasped by the RIP grasping tool 201a is lifted up to a certain position. To do. After that, the traveling carriage 8 of the refueling machine 3 is caused to travel, and the traverse carriage 9 is traversed so that the RIP gripping tool 201a comes directly above the spent fuel pool 5 and the dedicated hoist 101a.
RIP in the spent fuel pool 5 with the impeller shaft 25 held by the RIP gripper 201a
It is temporarily placed on the storage frame 32. To install the impeller shaft 25, the above procedure is reversed.

Next, the handling of the ICM will be described. I
The CM is a measuring instrument that indicates the output state of the core based on the measurement value of the neutron flux. 6 shows the ICM removal work, and FIG. 7 shows the ICM attachment work. As shown in FIG. 6, the procedure for removing the ICM 33 is as follows. First, the traveling carriage 8 of the refueling machine 3 travels, and the traverse carriage 9 traverses to the working position directly above the core 6 at the tip of the dedicated hoist 101b. Make sure that the attached measuring instrument handling tool 201b is coming. Next, the ICM 33 is grasped by the measuring instrument handling tool 201b, the dedicated hoist 101b is wound up, the ICM 33 grasped by the measuring instrument handling tool 201b is raised, and the raising is performed to a certain position. After that, the hydraulic clamp 3 attached to the tip of the auxiliary winding portion 17 (see FIG. 13) provided in the ceiling crane 4 in advance.
Hand over the above ICM33 to 4 and then ceiling crane 4
Is moved to the position immediately above the spent fuel pool 5, the winding of the ceiling crane 4 is loosened, and the ICM 33 is spent fuel pool.
Place on le 5. Further, when the ICM 33 is attached, as shown in FIG. 7, an incore strong back 35 is attached to the tip of the auxiliary winding portion 17 of the ceiling crane 4, a new ICM 33 is attached to the incore strong back 35, and this ICM 33 is a measuring instrument. It is sequentially taken out by the handling tool 201b, hung by the dedicated hoist 101b, and installed at the installation position.

Next, the handling of CR will be described. C
R is a control rod that controls the reactivity of the core by inserting and withdrawing between the fuel assemblies to adjust the power distribution. The fuel assembly FS supports the fuel at the correct position in the fuel assemblies. Is attached, the FS is removed before handling the CR, and the FS is attached again after handling the CR. Fig. 8 shows the FS handling work, and Fig. 9
The CR handling work is shown in.

As shown in FIG. 8, the procedure for removing the FS is as follows. First, the traveling carriage 8 and the traverse carriage 9 of the fuel changer 3 are adjusted to a working position directly above the core 6 and a dedicated hoist 101c is placed at the working position. Make sure that the FS handling tool 39 attached to the tip of the comes. Next, the FS handling tool 39 is used to grab the FS 41 and wind up the dedicated hoist 101c.
The FS 41 grasped by 01c is raised, and the FS 41 is raised to a certain position. After that, the traveling carriage 8 of the refueling machine 3 is caused to travel and the traverse carriage 9 is caused to traverse so that the FS handling tool 201c comes directly above the spent fuel pool 5 and the winding of the dedicated hoist 101c is loosened. The FS 41 grasped by the FS handling tool 201c is lowered and stored.

Next, the procedure for removing the CR42 is shown in FIG.
As shown in, the traveling carriage 8 of the fuel changer 3 is caused to travel,
A CR handling tool 201 attached to the tip of the dedicated hoist 101d at a work position immediately above the core 6 by traversing the traverse carriage 9
so that d comes. Next, C with CR handling tool 201d
Grab R42 and wind up dedicated hoist 101d to CR
The CR 42 grasped by the handling tool 201d is raised, and the CR 42 is raised to a certain position. After that, the traveling carriage 8 of the refueling machine 3 is caused to travel, and the traverse carriage 9 is traversed so that the FS handling tool 201c comes directly above the spent fuel pool 5,
Loosen the winding of the dedicated hoist 101d to handle CR 20
The CR 42 captured in 1d is lowered and stored in the control rod rack 43 in the spent fuel pool 5. To attach the CR42, reverse the above procedure. After the CR42 is attached, the FS41 is attached again, but the procedure is the reverse of the procedure for attaching the FS41.

The fact that the working time in the furnace can be shortened by this embodiment will be described below. FIG. 10 shows a conventional in-core handling work schedule, and FIG. 11 shows an in-furnace handling work schedule using the multifunctional in-core handling device according to this embodiment. As shown in FIGS. 10 and 11, in the in-reactor handling work, first, in the fuel transfer 50, the specified fuel is taken out using the fuel grasper 10 (see FIG. 3) and new fuel is loaded. Next, in the MS lining support ring removal 60, the MS lining support ring is removed by using the auxiliary hoist 11, and the radioactive leak inspection of the main steam is performed. Next, in the conventional method, the auxiliary hoist 11 is used, and in the present embodiment, 101a, 1
01b, 101c, 101d (see FIG. 3), R
IP impeller shaft removal 61, ICM replacement 62,
FS removal 63, CR replacement 64, and FS installation 65 are carried out in this order, and in addition to these, fuel replacement,
In the shuffling and irradiation fuel inspection 51, the fuel grasper 10 is used to reload the used fuel that is still usable and a burnup inspection of the specified fuel is performed. Next, the fuel replacement, shuffling, and irradiation fuel inspection 51 are temporarily stopped, the fine operation drive mechanism of the CR drive device is inspected in the FMCRD inspection 66, and the in-reactor internal structure is inspected in the in-reactor ISI 67. .. Next, refueling and shuffling 52 are performed again, and finally, RIP impeller shaft attachment 68 is performed.

As can be seen from FIGS. 10 and 11, in the in-reactor handling work using the multifunctional in-reactor handling apparatus according to the present embodiment, the RIP grip attachment 70 and the RIP for removing the RIP impeller shaft 61 are carried out. Grasping tool removal 71, measuring instrument handling tool attachment 72 for performing ICM replacement 62 and measuring instrument handling tool removal, F
FS handling tool attachment 7 for carrying out S removal 63
4. Removal of FS handling tool for carrying out CR replacement 64 and attachment of CR handling tool 75, Removal of CR handling tool for carrying out FS attachment 65 and installation of FS handling tool 7
6, CR handle removal 77, RIP grip attachment 78 and RIP grip removal 79 for performing RIP impeller shaft attachment 68 are omitted.

The time taken to attach and detach each of these omitted handling tools is shown in FIG. As shown in FIG. 12, in this embodiment, 3.5 hours required for attaching and detaching the RIP gripping tool, 4.0 hours required for attaching and detaching the measuring instrument handling tool, and C including the FS handling tool and the CR handling tool.
It takes 1 to attach and remove the handling tool for handling R
0.0 hours, a total of 21.0 hours will be shortened, and the handling time in the furnace can be greatly shortened. In addition, since the handling work time in the furnace can be shortened, the exposure dose of the worker can be reduced.

As described above, according to this embodiment, the dedicated hoists 101a, 101 are mounted on the traverse carriage 9 of the refueling machine 3.
b, 101c, 101d are installed, and each dedicated hoist has a RIP gripping tool 201a and a measuring instrument handling tool 201 in advance.
b, since the FS handling tool 201c and the CR handling tool 201d are attached respectively, it is not necessary to attach and detach each handling tool for each handling operation, and the handling time in the furnace can be shortened.

Next, a multi-function road handling device according to a second embodiment of the present invention will be described with reference to FIG. This embodiment is the same as the first embodiment except that the mounting positions of the four dedicated hoists are different. As shown in FIG. 13, the ceiling crane 4 has a traveling portion 13 and a traveling portion 1 movably installed on a traveling rail 4b laid on the beam 4a.
3 includes a traverse portion 14, a traveling rail 4c laid on the traverse portion 14 so as to be orthogonal to the traveling rail 4b, and a workbench 15 installed so as to travel freely on the traveling rail 4c. On the workbench 15, the main winding part 16 and the auxiliary winding part 1
7, dedicated hoist 102a for mounting the RIP gripping tool 201a, dedicated hoist 102b for mounting the measuring instrument handling tool 201b which is an ICM handling tool, FS handling tool 201c
Dedicated hoist 102c for attaching the CR and CR handling tool 2
A dedicated hoist 102d for attaching 01d is installed. This dedicated hoist 102a, 102b, 102
Reference characters c and 102d constitute the multi-functional furnace handling device according to the present embodiment.

The ceiling crane 4 has a main winding portion 16 and an auxiliary winding portion 17, and travels and traverses above the ceiling of the operation floor 2 by a traveling rail 4b and a traveling rail 4c, and is operated as described above. A hydraulic clamp 34 for handling the ICM 33 and an in-core strong back 35 are attached, an RPV head of a lid provided on the upper part of the reactor pressure vessel (RPV), a PCV of a lid provided on the upper part of the reactor containment vessel (PCV). The head and the dryer / separator provided so as not to let the steam generated in the core escape to the outside are handled. Further, the RIP gripper 201a attached to the dedicated hoists 102a, 102b, 102c, 102d constituting the multi-functional furnace handling device, the measuring instrument handling tool 20.
1b, the FS handling tool 201c, and the CR handling tool 201d, the RIP 21 and the ICM are exactly the same as in the first embodiment.
33, FS41, and CR42 are handled. Therefore, it is not necessary to attach and detach each handling tool for each handling work, and the handling time in the furnace can be shortened.

As described above, according to this embodiment, the same effect as that of the first embodiment can be obtained.

Next, a multi-function road handling device according to a third embodiment of the present invention will be described with reference to FIGS. 14 and 15. This embodiment is similar to the first and second embodiments except that the mounting positions of the four dedicated hoists are different. As shown in FIG. 14, a dedicated traveling rail 1b and a work carriage 18 that can travel on the dedicated traveling rail 1b are provided on the lower surface of the ceiling 1a.
On the 8 is a RIP handle 201a which is a RIP handling tool.
Dedicated hoist 103a for attaching a measuring instrument handling tool 201b which is an ICM handling tool
3b, dedicated hoist 1 for attaching FS handling tool 201c
03c and a dedicated hoist 103d for mounting the CR handling tool 201d are installed. This special hoist 10
3a, 103b, 103c and 103d constitute the multi-functional in-core handling device according to the present embodiment.

FIG. 15 shows a view of the ceiling 1a from below.
As shown in FIG. 15 (a), a dedicated traveling rail 1b and a dedicated traverse rail 1c are laid on the lower surface of the ceiling 1a, and further at the intersection of the dedicated traveling rail 1b and the dedicated traverse rail 1c located directly above the reactor core 6. Is provided with a turntable 1A provided with a rotating rail 1d. Work trolley 18
First, as shown in FIG. 15 (a), first, the exclusive traveling rail 1
15b, stops on the rotating rail 1d provided on the turntable 1A, and as shown in FIG. 15B, the turntable 1A turns to change its direction at a right angle, As shown in, traverse on the exclusive traverse rail 1c. As a result, the carriage 103 can be moved to a work position directly above the core 6.

The RIP gripping tool 201a, the measuring instrument handling tool 201b, the FS handling tool 201c, and the CR handling tool 201d attached to the dedicated hoists 103a, 103b, 103c, 103d constituting the multi-functional furnace handling device, respectively. , RIP2 exactly as in the first embodiment
1, ICM33, FS41, and CR42 are handled. Therefore, it is not necessary to attach and detach each handling tool for each handling work, and the handling time in the furnace can be shortened.

As described above, according to this embodiment, the same effect as that of the first embodiment can be obtained.

Next, a multi-function road handling device according to a fourth embodiment of the present invention will be described with reference to FIG. This embodiment is similar to the first and second embodiments except that the mounting positions of the four dedicated hoists are different. Figure 1
6, a work carriage 20 is movably installed on a travel rail 3a on which a fuel changer 3 laid on the floor of the operation floor 2 travels. This work trolley 20 has the same configuration as the fuel changer 3. That is, the work cart 2
Reference numeral 0 denotes a traveling carriage 20a movably installed on the traveling rail 3a, a traverse rail 20b laid on the traveling carriage 20a so as to be orthogonal to the traveling rail 3a, and a transverse carriage 20c movably installed on the transverse rail 20b. It is composed of On this traverse trolley 20c, there is R which is a RIP handling tool.
Dedicated hoist 104 for attaching the IP gripper 201a
a, a dedicated hoist 104b for mounting the measuring instrument handling tool 201b which is an ICM handling tool, a dedicated hoist 104c for mounting the FS handling tool 201c, and a CR handling tool 201d
The dedicated hoist 104d for attaching the is installed.
This dedicated hoist 104a, 104b, 104c, 10
4d constitutes the handling apparatus in the multifunctional furnace according to the present embodiment.

The RIP gripping tool 201a, the measuring instrument handling tool 201b, the FS handling tool 201c, and the CR handling tool 201d attached to the dedicated hoists 104a, 104b, 104c, 104d constituting the multi-functional furnace handling device, respectively. , RIP2 exactly as in the first embodiment
1, ICM33, FS41, and CR42 are handled. Therefore, it is not necessary to attach and detach each handling tool for each handling work, and the handling time in the furnace can be shortened.

As described above, according to this embodiment, the same effect as that of the first embodiment can be obtained.

In the above four embodiments, the multi-functional furnace handling device is used as the refueling machine 3 (see FIG. 3) or the ceiling crane.
4 (see FIG. 13), a work carriage 18 (see FIG. 14) movably installed on the lower surface of the ceiling 1a, or a work carriage 20 (see FIG. 16) movably installed on the traveling rail 3a. It is installed in either one of them, but these can also handle multiple RIPs, ICMs, or CRs at once by combining two, three, or all of the multifunctional reactor handling devices. You can

Of the inserts other than fuel, 10 RIPs
There are 112 ICMs and 216 CRs, of which RIP is 2 and ICM is 16 in one in-core handling operation.
7 bodies and CRs are handled. Therefore, for example, by mounting the multi-functional in-reactor handling device described in the first to fourth embodiments on each of the refueling machine 3, the ceiling crane 4, the work carriage 18, and the work carriage 20, RIP at once
It is possible to handle two of the ICMs, to handle four ICMs without replacing the handling tools, and to continuously handle four CRs without replacing the handling tools. Therefore,
In addition to the effect of the first to fourth embodiments, that is, the work time for exchanging each handling tool is shortened, the work time is further shortened by being able to handle a plurality of the same inserts at the same time. It

[0045]

According to the present invention, a refueling machine, an overhead traveling crane, a work carriage capable of traveling on a dedicated traveling rail provided on the ceiling, or a traveling truck for a refueling machine is separately traveled. RI can be added to the dedicated work cart that is installed
A first lifting machine for mounting a handling tool of P, a second lifting machine for mounting a handling tool of ICM, a third lifting machine for mounting a handling tool of CR, and a fourth lifting machine for mounting a handling tool of FS. Since and are installed, the RIP gripping tool, the FS handling tool, the CR handling tool, and the ICM handling tool can be handled by their respective dedicated lifting machines. Therefore, it is not necessary to replace the handling tool for each handling work, and the handling time in the furnace can be shortened.

Further, since the above-mentioned multi-functional furnace handling devices are combined in two types, three types or all of them, a plurality of the same inserts can be handled at the same time, so that the working time is further shortened. ..

Therefore, the work time can be shortened and the exposure dose can be reduced without affecting the periodic inspection process, the operation and soundness of the nuclear power plant.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an operation floor in a reactor building equipped with a multi-functional reactor handling device according to a first embodiment of the present invention.

2 is a plan view of an operation floor in the reactor building shown in FIG. 1. FIG.

FIG. 3 is a diagram showing a fuel handling machine in which the multifunctional reactor handling device shown in FIG. 1 is installed.

FIG. 4 is a sectional view showing the entire RIP structure.

FIG. 5: RI using the multifunctional reactor handling device shown in FIG.
It is a figure which shows P removal work.

FIG. 6 is an IC using the multifunctional in-core handling device shown in FIG.
It is a figure which shows M removal work.

FIG. 7 is an IC using the multifunctional in-core handling device shown in FIG.
It is a figure which shows M attachment work.

FIG. 8 is an FS using the handling apparatus in the multifunctional furnace shown in FIG.
It is a figure which shows removal work.

FIG. 9 is a CR using the multifunctional in-core handling device shown in FIG.
It is a figure which shows removal work.

FIG. 10 is a diagram showing a conventional in-core handling work schedule.

11 is a diagram showing an in-core handling work schedule using the multifunctional in-core handling apparatus shown in FIG.

FIG. 12 is a diagram summarizing the time of attachment / detachment of each handling tool omitted according to the present invention.

FIG. 13 is a diagram showing a multifunctional in-reactor handling device according to a second embodiment of the present invention.

FIG. 14 is a diagram showing a multi-functional furnace handling device according to a third embodiment of the present invention.

FIG. 15 is a diagram for explaining traveling and traverse of a work carriage on which the multifunctional furnace handling device shown in FIG. 14 is installed;
(A) is a figure which shows a running state, (b) is a figure which shows the direction conversion state by a turntable, (c) is a figure which shows a traverse state.

FIG. 16 is a diagram showing a multi-functional furnace handling device according to a fourth embodiment of the present invention.

[Explanation of symbols]

1 Reactor Building 1a Ceiling 1b Traveling Rail 1c Traverse Rail 1d Rotating Rail 1A Turntable 2 Operation Floor 3 Refueling Machine 3a Traveling Rail 3b Traversing Rail 4 Ceiling Crane 4a Beam 4b Traveling Rail 6 Reactor 8 Traveling Vehicle 9 Traversing Vehicle 13 Part 14 Traverse part 15 Worktable 18 Work trolley 20 Work trolley 20a, Traveling trolley 20b, Traverse rail 20c Traverse trolley 21 RIP 25 Impeller shaft 33 ICM 41 FS 42 CR 101a, 101b, 101c, 101d Dedicated hoist 102a, 102b, 102c , 102d Dedicated hoists 103a, 103b, 103c, 103d Dedicated hoists 104a, 104b, 104c, 104d Dedicated hoists 201a, 202a, 203a RIP grippers 201b, 202b 203b instrument handling device 201c, 202c, 203c FS handling device 201d, 202d, 203d CR handling tool

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihiro Kodama 3-1-1 1-1 Saiwaicho, Hitachi City, Ibaraki Hitachi Ltd. Hitachi Works

Claims (7)

[Claims] 1. The reactor coolant in the core is forced onto a fuel changer equipped with a fuel gripper installed so that it can travel on a traveling rail laid on the operation floor of the reactor building of a nuclear power plant. Attaching the handling tool of the reactor coolant recirculation pump that circulates and effectively extracts the heat generated from the fuel assembly of the core and controls the output of the reactor.
And the second lifting machine to which the handling tool of the in-core neutron flux monitor that indicates the output state of the core based on the measured neutron flux value is attached, and the reactivity distribution of the core is controlled to adjust the power distribution. A third lifting machine for attaching control rod handling equipment,
A multifunctional in-reactor handling device comprising: a fourth lifting machine to which a fuel support handling tool for holding a fuel support that supports fuel in a correct position is attached. 2. The heat generated from the fuel assembly of the core by forcibly circulating the reactor coolant in the core to the work table of the overhead crane installed on the ceiling of the operation floor of the reactor building of the nuclear power plant. First lifter to which the handling tool of the reactor coolant recirculation pump that controls the output of the reactor is installed, and the neutron flux monitor in the reactor that indicates the output state of the core based on the measured value of the neutron flux The second lifting machine to which the handling tool of No. 2 is attached, the third lifting machine to which the handling tool of the control rod that controls the reactivity of the core to adjust the power distribution is attached, and the fuel support that supports the fuel in the correct position. A multifunctional in-reactor handling device characterized in that a fourth lifting machine for attaching a gripping fuel support handling tool is installed. 3. A dedicated traveling rail provided on the lower surface of the ceiling of the operation floor of the reactor building of the nuclear power plant,
A work carriage installed so as to be able to travel on the dedicated traveling rail, and a reactor coolant provided in the work carriage forcibly circulates the reactor coolant to effectively take out heat generated from the fuel assembly of the core A first lifting machine for attaching a handling tool for a reactor coolant recirculation pump for controlling the output of the reactor;
A second hoist equipped with a handling tool for the in-core neutron flux monitor, which is provided on the work carriage and indicates the output state of the core based on the measured value of the neutron flux, and the reactivity of the core provided on the work carriage. A third lifting machine for attaching a control rod handling tool that controls and adjusts the output distribution, and a fourth lifting machine for attaching a fuel support handling tool that holds a fuel support that is provided on a work carriage and supports fuel in a correct position. A multifunctional in-reactor handling device having a heavy machine. 4. A dedicated work truck separately installed on a traveling rail for a refueling machine provided on an operation floor of a nuclear power plant nuclear reactor building, and a core provided on the dedicated work truck. And a first lifter for attaching a handling tool for a reactor coolant recirculation pump for forcibly circulating the reactor coolant in the chamber to effectively take out the heat generated from the fuel assembly of the core and control the output of the reactor. A second lifting machine provided on the dedicated work carriage for attaching a handling tool for an in-core neutron flux monitor that indicates the output state of the core based on the measured value of the neutron flux; and a core provided on the special work carriage. A fuel support that holds a third lifting machine to which a handling tool for a control rod that controls the reactivity and adjusts the output distribution is attached, and a fuel support that is provided on the dedicated work carriage to support the fuel in a correct position. And a fourth lifting machine to which a handling tool is attached. 5. A multifunctional in-reactor handling device comprising a combination of two multifunctional in-reactor handling devices according to any one of claims 1 to 4. 6. A multifunctional in-reactor handling device comprising a combination of three multifunctional in-reactor handling devices according to any one of claims 1 to 4. 7. A multifunctional in-reactor handling device comprising all of the multifunctional in-reactor handling devices according to claims 1 to 4.