JPH09113667A - Method for constructing upper drywell in reactor containment and module used in this method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the shortening of the construction period and improve the safety in the work for building a nuclear power plant. SOLUTION: In the construction of a nuclear power plant, core internals consisting of a reactor shielding wall 4 placed in an upper drywell, pipes 12, a cable tray, an air-conditioning duct 14, a pipe whip structure 5 and a pedestal and an upper drywell liner 6 are integrated in a manufacturing plant or a knockdown yard. Then, the pipes are joined at the penetration into the upper drywell liner 6 and connecting construction work is carried out between the upper drywell and the structures in it. After the construction finishes, the grooves of the pipes are adjusted one by one, the pipes are welded and non-destructive inspections are conducted after setting the pipes. Subsequently, the integrated modules are brought in a reactor building by a large crane.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is in the technical field of constructing a nuclear power plant.

[0002]

2. Description of the Related Art In the construction of an improved boiling water nuclear power generation (hereinafter simply referred to as ABWR) plant, among reinforced concrete reactor containment vessels (hereinafter simply referred to as RCCV) characterized by being made of reinforced concrete. , The cylindrical reactor shield wall, pipes, valves, supports, cable trays, air-conditioning ducts, structures, pedestals, and other equipment and pipes that are installed and set in the upper drywell are integrated in the local assembly yard. Equipment and piping modules are made in advance, and after they are loaded into the building containing the reactor containment vessel by a large mobile crawler crane, RCCV
The connection pipe with the RCCV penetration (RCCV pipe penetration part) attached to the drywell liner was set.

At this time, the RCCV penetration connection pipe is carried in the module in a temporarily suspended or temporarily placed state, and the pipe alignment and welding of each product with the RCCV penetration part attached to the upper dry well liner which has already been carried in. Performs non-destructive inspections after setting the piping, and further, in setting work after suspending the module, RCC
RC work for cutting the bar arrangement on the V penetration section and RC
In order to avoid interference with the scaffolding on the building side in CV construction, R
It was necessary to cut the RCCV penetration that contacts the CCV mating wall.

[0004]

[Problems to be Solved by the Invention] The connection pipe with the RCCV penetration attached to the upper dry well liner is
Since the upper dry well module and the upper dry well liner are separately loaded, the setting must be started after the completion of the dry well module hanging setting.

The pipe spool / valve of the RCCV penetration connection part is carried in the module in a temporarily suspended or temporarily placed state, and when installing the pipe penetrating the RCCV penetration part attached to the upper dry well liner already carried in, Pipe groove alignment work for each individual item
We performed the setting work by performing non-destructive inspection, etc. after welding the pipes and setting the pipes.

[0006] Further, in order to avoid the interference with the scaffolding on the building side in the cutting work of the bar arrangement on the RCCV penetration part and the RCCV construction, the RC which contacts the RCCV connecting wall part
I was working on cutting the CV penetration.

For this reason, the pipe fitting work period is long, and each of the above-mentioned works is carried out in a narrow space in the building, and the work at a high place, which is dangerous, is inevitable. It was not the most suitable construction method in terms of safety and work efficiency.

[0008] Therefore, there is a demand for a module and a construction method which can contribute to improving the safety and work efficiency of the work for constructing an upper dry well of a reactor containment vessel of a nuclear power plant.

A first object of the present invention is to provide a module that can contribute to improving the safety and work efficiency of the construction work of the reactor containment vessel upper dry well.
It is an object of the present invention to provide a method of constructing a dry well of an upper containment vessel of a nuclear reactor for improving safety and work efficiency of construction work using the module.

[0010]

[Means for Solving the Problems] A first means for achieving the above-mentioned first object is a liner of a reactor containment vessel upper dry well assembled in a cylindrical shape, and a reactor arranged inside the liner. This module is used in a method for constructing a dry containment vessel upper dry well, which comprises equipment and piping modules in the containment vessel upper dry well.

[0011] Similarly, the second means is to integrate the pipe in the dry well of the upper containment vessel and the cylindrical liner of the dry well of the upper containment vessel by assembling the pipe into the pipe penetrating portion of the liner. This module is used for the method of constructing the dry well in the upper containment vessel.

[0012] Similarly, the third means is a group of installed products in the dry well of the upper containment vessel of the reactor containment vessel which are placed in a mutual installation positional relationship, and a reactor containment vessel which is placed in an installation positional relationship with the installed product group. The cylindrical liner of the upper dry well, the pipe in the installation product group is assembled to the pipe penetration part of the liner, and the installation product group and the liner of the reactor containment vessel upper dry well are integrated. It is a module used in the construction method.

[0013] Similarly, the fourth means comprises a cylindrical reactor shield wall, a pipe whip structure attached to the reactor shield wall, and a reactor containment vessel upper dry well provided around the pipe whip structure. A cylindrical liner and a device / piping in the reactor containment vessel supported in the pipe whip structure in a final installation positional relationship are provided, and a part of the pipe is an atom attached to a pipe penetration portion of the liner. This module is used for the method of constructing the dry well in the upper containment vessel.

Similarly, the fifth means is any one of the first means to the fourth means, and is provided with a bar arrangement which is an element constituting the reinforced concrete wall of the reactor containment vessel along the outer periphery of the cylindrical liner. It is a module used for the method of constructing the dry well above the PCV.

Similarly, in the sixth means, a plurality of beams projecting outward are provided on the outer circumference of the cylindrical liner in the fifth means, and the beams are arranged so as to intersect the plurality of beams, and along the outer circumference of the cylindrical liner. This module is used for the method of constructing the upper dry well of the reactor containment vessel, which is provided with the reinforcements that are the elements that make up the reinforced concrete wall of the reactor containment vessel.

Similarly, a seventh means is characterized in that, in any one of the first means to the sixth means, the liner is engaged with a constituent member of a module existing inside the liner. This module is used for the method of constructing the dry well in the upper containment vessel.

Similarly, in the eighth means, in the seventh means, the module member is a pipe whip structure, and the pipe whip structure is formed by a plurality of beams projecting inward from the cylindrical liner of the upper drywell of the reactor containment vessel. The liner and the pipe whip structure are engaged with each other so as to be movable relative to each other in the horizontal direction, and the module is used in the method for constructing the upper drywell of the reactor containment vessel.

A ninth means for achieving the second object of the present invention is a module for use in the method for constructing an upper dry well of a reactor containment vessel according to any one of the first means to the eighth means. Assembled at the local assembling yard at the plant or reactor containment construction site or at both of them, and then hoisting the modules together at the site of the reactor containment construction site, and the reactor constructed in advance This is a method of constructing the upper drywell of the containment vessel that is hung and installed above the lower drywell of the primary containment vessel.

[0019] Similarly, the tenth means is the upper part of the reactor containment vessel according to any one of claims 1 to 8 at a local ground yard at a factory or a reactor containment vessel construction site or at both locations. The module used in the drywell construction method is integrated with the diaphragm floor beams and diaphragm floor reinforcements to enlarge the module, and then the enlarged module is collectively assembled at the site of the reactor containment construction site. It is a construction method of the upper dry well of the reactor containment vessel, which is lifted up and installed above the lower dry well of the reactor containment vessel constructed earlier.

Similarly, the eleventh means is from the ninth means to the tenth means.
In any one of the means, characterized in that the rebar that constitutes the reinforced concrete wall of the reactor containment vessel is assembled along the outer periphery of the cylindrical liner to enlarge the module and then the module is lifted together with the rebar. This is the construction method of the dry well above the PCV. Similarly, the twelfth means is the structure in the dry well of the reactor containment vessel, the cylindrical liner of the dry well of the reactor containment vessel, the bar arrangement which is an element constituting the wall of the reactor containment vessel, and the liner of the liner. A plurality of beams protruding from the liner are used for the inner side and the outer side, and the pipe whip structure, which is a configuration inside the reactor containment vessel upper dry well, is movable in the cylindrical radial direction by the plurality of inner beams. And the reinforcement is arranged along the liner so as to intersect with the plurality of outer beams to construct a module, and then the module is lifted to construct a lower reactor containment vessel lower drywell. It is hung upwards, and then concrete is applied to the outside of the liner to attach the outside beam to the concrete. Is a construction method of the reactor containment vessel upper drywell for burying and.

Similarly, the thirteenth means includes the ninth means to the twelfth means.
In any one of the above-mentioned means, a method for constructing a dry well of a reactor containment vessel, characterized in that cleaning of a pipe constituting the module and / or pressure resistance test are performed prior to lifting the assembled module. Is.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS ABW constructed by applying the present invention
The R plant has a reinforced concrete reactor containment vessel (RCCV) 10 in the central portion of the reactor building 2.

The structure is a cylindrical structure having a diameter of about 29 meters, and an RPV pedestal 7 on which a reactor pressure vessel (hereinafter, simply referred to as RPV) 3 is mounted is provided in a central portion thereof.

A cylindrical reactor shield wall 4 is set above the RPV pedestal 7, and the reactor shield wall 4 can surround the RPV 3.

The RCCV10 has a thick reinforced concrete structure for the entire floor and walls so as to sufficiently withstand high pressure and vibration.

The outer wall of the RCCV 10 is separated from the diaphragm floor 11 by a lower wet well 8 and a lower dry well 9.
And the upper dry well 1.

Structures in the upper dry well 1 and the upper dry well liner 6 for construction and installation using the present invention
The integrated module is installed above the diaphragm floor 11 as a reference.

FIG. 1 shows the positions of the upper dry well 1 and the upper dry well liner 6 in the completed reactor building 2.

Next, the upper dry well 1 using the present invention
The super-large module used for the construction will be described.

FIG. 2 shows a bird's eye view of the situation before the upper dry well liner 6 is assembled to the module.

In FIG. 2, a plurality of pipes 12, air conditioning ducts 14 and other equipment products, which are products to be installed in the upper dry well of the pipe whip structure 5, are installed at the completion of the plant (final installation position). It is fixed to the product to prevent the relative position of each product from shifting, and is used as an equipment / piping module.

As a part of the plurality of pipes 12, a main steam pipe and a water supply pipe connected to the reactor pressure vessel are included. These some pipes are used for suspending the reactor pressure vessel and the module. Due to the connection later, only the part of the total length of the pipe close to the reactor pressure vessel is installed at a temporary position separately from other parts, and the other part is fixedly installed at the final installation position and becomes a member of the module. ing.

In this equipment / piping module, a pipe whip structure 5 is fixed to the outer periphery of the cylindrical reactor shield wall 4 at the installation position at the time of completion of the plant, and at that time, some pipes are installed in the reactor shield wall. It is installed in the pipe penetration part of No. 4.

After that, the upper dry well liner 6, which is controlled for several minutes, is set in a cylindrical shape around the pipe whip structure 5.

The upper dry well liner 6 is attached with an RCCV penetration 16 through which a part of the pipe 12 such as a main steam pipe penetrates. A part of the pipe 12 is assembled to the RCCV penetration 16 in the final installed state and modularized.

As described above, the main constituent members of the module are the equipment, pipes, pipe whip structures, liners, and bar arrangements in the reactor shield wall and the dry well in the upper containment vessel.

Among them, the reactor shielding wall is provided with a double steel cylinder structure made of steel plate and is filled with concrete for use. However, the module may be hung at the installation position and installed before the concrete is constructed. The concrete may be applied before the module is hung in the installation position and installed.

The assembly is carried out with the pipe 12 penetrating the RCCV penetration 16.

FIG. 3 shows a module in which the structure in the upper dry well 1, the upper dry well liner 6 and the bar arrangement 15 are collectively made in this way.

Further, when it is necessary to improve work efficiency, the reinforcing bar 15 of the inner wall is cylindrical along the outer periphery of the upper dry well liner 6 which is a steel member also serving as a concrete formwork on the inner wall side of the RCCV10. To deploy.

FIG. 4 shows one in which the reinforcing bar 15 is also incorporated and modularized.

Further, if it is necessary to further improve the working efficiency, the pipe whip structure 5 in the upper dry well 1 and the reinforcing bars and / or beams mixed in the diaphragm floor 11 are joined thereto, and the diaphragm floor 11 is joined.
It is also possible to incorporate the above-mentioned constitutional necessities into a module at once.

The longitudinally and horizontally assembled bar arrangements 15 are hooked by a plurality of beams 17a fixed to the upper drywell liner 6, and the relative displacement between the upper drywell liner 6 and the bar arrangements 15 is suppressed to be small. doing.

The upper dry well liner 6 has a plurality of beams 17 fixed to the inner surface of the upper dry well liner 6.
b is sandwiched between the constituent beams or columns of the pipe whip structure 5 so that the relative positional relationship between the upper drywell liner 6 and the pipe whip structure 5 is not greatly shifted.

The upper dry well liner 6, the pipe whip structure 5, and the bar arrangement 15 are designed so that the final installation positional relationship is not disturbed as much as possible.

Upper drywell liner 6 and pipe whip structure 5 in the module after hanging
FIG. 5 shows a cross-sectional view of the relationship between the bar arrangement 15 and main piping.

The plurality of beams 17b has a liner 6 at one end.
Is fixed to the pipe whip structure 5 at the other end.
Struts and horizontal beams, which are members of, are sandwiched vertically and horizontally.

Therefore, the cylindrical liner 6 can move without being constrained in the radial direction thereof, but is constrained from the pipe whip structure 5 in the other directions to maintain the relative positional relationship.

Therefore, after the module is installed and the reactor containment vessel is completed, even if displacement occurs due to some cause, the pipe whip structure 5 is moved in the radial direction.
And the liner 6 do not interfere with each other.

To avoid interference in other directions as well, after the module has been installed in place in the reactor building,
The plurality of beams 17b are removed.

The other ends of the plurality of beams 17b may be fixed to the pipe whip structure 5 to form a module. In that case, after the modules are installed at a predetermined position in the reactor building, the pipe whip is installed. In order to avoid interference between the structure 5 and the liner 6,
It is essential to remove the plurality of beams 17b.

The other plurality of beams 17b are embedded together with the reinforcing bar 15 in the concrete to be cast on the outside of the liner 6 after the module is installed at a predetermined position in the reactor building, and the liner anchor for the concrete is provided. Used for.

Next, since the reinforced concrete in the diaphragm floor 11 is a fluid itself at the time of placing concrete and cannot bear the load at all, and the weight of the concrete itself is large, the reinforced concrete in the diaphragm floor 11 is In order to construct a flat floor surface with concrete, there is a brittle surface against compression load and bending load.

Therefore, it is a general method to carry in the module after waiting for the solidified state having the strength of concrete.

However, in order to shorten the construction process, the reactor shield wall 4 in the module of the present invention, the reactor shield wall 4 below the diaphragm floor 11 and the RPV pedestal 7 are installed. By supporting a certain amount of load against the weight and by strengthening the support material raised from the bottom floor of the RCCV10, the upper dry well without waiting for the solidified state with concrete strength. It is also possible to suspend the module of.

If a module incorporating the reinforcing bar 15 is also used, it is not necessary to install a scaffold for setting the reinforcing bar near the liner. Therefore, the RCCV penetration 16 part in the setting work after the module is suspended can be applied. The cutting work of the RCCV penetration 16 contacting the RCCV10 connecting wall part is eliminated in order to avoid the interference with the scaffold on the building side in the cutting work of the streak 15 and the RCCV10 construction.

In this state, the large mobile crawler crane 1
8 is used to carry it into the reactor building 2 and set 15 rebar arrangements around the RCCV10 between the upper drywell liner 6 and the outer wall of the RCCV10 and outer rebar arrangements, and then concrete is placed, It will be set.

On the other hand, FIG. 6 shows that the module is carried into a part of the upper dry well in the reactor building 2 by using the large mobile crawler crane 18.

In order to suspend the super-large module of the upper dry well 1, since the reactor shield wall 4 is heavy, it is connected immediately before the module is suspended to ensure the rigidity of the pipe whip structure 5.

It is difficult for the pipe whip structure 5 to bear the weight of the reactor shielding wall 4.

Since the upper drywell liner 6 is a fairly thin structure and is easily deformed or distorted, a plurality of suspensions are required to evenly distribute the load applied to the reactor shield wall 4 and the upper drywell liner 6. You need points.

From the above, when the module is hung by the crane and carried in on the lower dry well in the reactor building 2, the way to hang the module is as follows.

That is, from the hook of the crane to the wire 19a
The hanging balance 20 is hung by, and the large hanging balance 23 is hung by the other wire 19a.

Next, as shown in FIG. 7, the wire 19b is slanted between the pipe whip structure 5 and the suspension balance 20 and between the reactor shielding wall 4 and the suspension balance 20.

Further, the wire 19c is hung vertically from the suspension balance 23 to the liner 6 and the bar arrangement 15.

When the module is hoisted by the crane after the wires are hung in this way, the liner 6 and the bar arrangement 15 are hung by the vertical wire 19c, so that the liner 6 and the bar arrangement 15 can be bent even if the strength is not great. Can be lifted without distortion.

The pipe whip structure 5 and the reactor shielding wall 4 are hung by the wire 19b stretched obliquely, but they are more flexible than the liner 6 and the reinforcing bar 15 because of their high strength.

Since the hanging points are distributed over the entire module, a large concentrated load is not applied to a part of the product constituting the module when the module is hung.

Next, the reactor shield wall 4, the pipe 12, the valve 13, the air conditioning duct 14, which is connected to the inside of the upper dry well 1,
FIG. 8 shows a plane view of the pipe whip structure 5, the mount 21 and the like, and FIG. 9 shows a detailed view thereof.

In this figure, the RCCV penetration 1 is attached to the upper dry well liner 6 in the piping 12 of the reactor system.
6 is installed, and the RCCV connection pipe 22 that serves as the connection of the upper dry well liner 6 inside the RCCV penetration 16 is temporarily installed in the module after the building is carried into the module and the temporary installation is released to perform the main installation work. The figure of the construction method is shown.

FIG. 10 is a plan view showing a condition in which the RCCV coupling pipe 22 is fully installed at the module assembly stage according to the present invention, and FIG. 11 is a detailed view thereof.

Support for the pipe 12 in the upper dry well 1 or the pipe 12 in an emergency situation when the pipe 12 fails
The pipe whip structure 5 provided for the purpose of eliminating the variation and contact between the pipe 12 and the pipe 12 is mainly arranged in a horizontal or vertical state as shown in FIG. 8 or 10, and the basic structure is as follows. Radial beams are arranged horizontally from the ring-shaped beam toward the center.

The tips of the radial beams are welded to the cylindrical outer wall of the reactor shield wall 4, and the upper part of the pipe whip structure 5 having a polygonal shape can be installed as an integrated module in each place. The structure in 1 is installed. According to the present invention, by installing the RCCV connecting pipe 22 before suspending the module, it is possible to perform the preceding withstand pressure test / cleaning work and non-destructive inspection of the pipe 12 at the module assembly stage, and the module in the conventional method can be used. This is a safe, efficient, and rational construction method that eliminates groove alignment of the pipe 12 after welding, welding of the pipe 12, and nondestructive inspection after setting.

[0074]

According to the first aspect of the present invention, the dry well of the reactor containment vessel and the products forming the inside can be collectively carried into the installation position, so that the installation man-hour can be greatly reduced and the height can be increased. It is possible to provide a module used in a method for constructing a dry well of a reactor containment vessel upper portion, which can reduce the work and contribute to safety of work related to the construction of the upper portion of the reactor containment vessel and shortening of the construction period.

According to the second aspect of the present invention, since the pipe and the liner are already attached in the module state, the attaching work at a high place is omitted, and the safety of the construction work on site is ensured. It is possible to provide a module used for a method for constructing a dry well in the upper containment vessel that can contribute to shortening the construction period.

According to the third aspect of the present invention, the dry well of the reactor containment vessel and each product constituting the inside can be collectively loaded into the installation position, and at the time of loading, each product is in the final installation positional relationship. It takes less time to set the positional relationship, and furthermore, the piping and liner are already attached in the module state, so installation work at high places is largely omitted, and construction work at the site is greatly reduced. It is possible to provide a module used for a method of constructing a dry well of a reactor containment vessel, which can contribute to the improvement of the safety and the shortening of the construction period.

According to the fourth aspect of the present invention, the cylindrical reactor shielding wall and the pipe whip structure are fixed to form a strong pedestal, and a large amount of equipment and piping in the reactor containment vessel are supported by this. It is possible to improve the efficiency of construction work by increasing the equipment and piping that can be hung together at the installation position in a batch, and the equipment and piping are already in the final installation position in the module state, and the piping and liner are attached. Since it is in a state, installation work at high places can be largely omitted, and construction of a dry well above the reactor containment vessel that can contribute to improving the safety of construction work locally and shortening the construction period further A module used in the method can be provided.

According to the invention of claim 5, in addition to the effect by the invention of any one of claims 1 to 4,
Since the rebar of the containment vessel can also be assembled and carried into the installation position at the same time as the equipment piping and liner in the drywell, the work for heightening the assembly and installation of the bar is eliminated, and the scaffolding for that work is unnecessary. A module used for the construction of the drywell of the reactor containment vessel that can contribute to the shortening of the construction period and the improvement of the safety of the construction work without the trouble of assembling and removing the scaffold and avoiding the interference between the scaffold and the suspension module. Can be provided.

According to the invention of claim 6, in addition to the effect of the invention of claim 5, even if the module is hung down to the installation position, the bar arrangement does not get caught in the beam and the position of the bar arrangement is not largely displaced. Installation work can be done safely and quickly.

According to the invention of claim 7, the position of the liner in the module is restrained and the shift is suppressed, so that the installation work can be performed safely and quickly.

According to the invention of claim 8, in addition to the effect of the invention of claim 7, since the cylindrical liner can be displaced in the radial direction, the difference in thermal expansion and the atomic force after the nuclear power plant is completed. It is possible to change the liner due to changes in the internal pressure of the reactor containment vessel, and suppress interference with adjacent equipment.

According to the invention of claim 9, the dry well of the reactor containment vessel and the products constituting the inside can be collectively carried to the installation position, so that the installation man-hour can be greatly reduced and the operation at a high place can be performed. It is possible to provide a method for constructing a dry well of a reactor containment vessel upper portion, which can achieve reduction and contribute to safety of work related to the construction of the upper portion of the reactor containment vessel and shortening of the construction period.

According to the invention of claim 10, in addition to the same effect as the invention of claim 7, since the construction member of the diaphragm floor can be carried in and installed at the same time, the safety and the construction period of the work concerning the construction of the upper part of the reactor containment vessel can be improved. It is possible to provide a method for constructing a dry well in the upper containment vessel that can further contribute to shortening the time.

According to the invention of claim 11, in addition to the effect according to any one of claims 7 to 9, even the bar arrangement constituting the wall of the reactor containment vessel is moved to the installation position at the same time as the module. Since it can be suspended, it is possible to provide a method for constructing a dry well of the upper containment vessel that can further contribute to the safety of work related to the construction of the upper containment vessel and shortening of the construction period.

According to the twelfth aspect of the invention, the liner of the dry well of the reactor containment vessel and the bar arrangement on the outer side of the liner are directly or indirectly connected to the module part on the inner side of the liner by each beam. Therefore, the collapse of the relative positional relationship between the constituent members of the module can be easily suppressed, construction work can be performed safely and in a short period of time, and the beam outside the liner acts as a liner anchor to the concrete wall outside the liner. Can also be used to reduce waste.

According to the invention of claim 13, in addition to the effect of the invention of claim 9 or claim 12, there is no need to perform cleaning or testing on the pipe at a high place where the scaffold is unstable, and The test work can be safely accomplished.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of the reactor building showing the positions of an upper drywell portion and an upper drywell liner in the reactor building.

FIG. 2 shows a bird's-eye view of an upper dry well module in a conventional method.

FIG. 3 is a bird's eye view of an upper dry well module of the present invention.

FIG. 4 is a bird's eye view of an upper drywell module according to another example of the present invention.

5 is a vertical cross-sectional view showing the arrangement of a pipe whip structure, some pipes, an upper dry well liner, and RCCV reinforcement after the module of FIG. 4 is suspended.

FIG. 6 is an elevational view showing a loading / unloading situation of the module of FIG. 4 in the reactor building according to the present invention.

FIG. 7 is an elevational view showing a wire hanging state when a module is suspended by setting the suspension balance of FIG.

FIG. 8 is an enlarged plan view of the upper dry well module when the pipe is not fixed to the liner side.

FIG. 9 is an enlarged view of a portion A in FIG. 8;

FIG. 10 shows a plan view of the module of FIG.

11 is an enlarged view of a portion A in FIG. 10;

[Explanation of symbols]

1 ... Upper dry well, 2 ... Reactor building, 3 ... Reactor pressure vessel (RPV), 4 ... Reactor shielding wall, 5 ... Pipe whip structure, 6 ... Upper dry well liner,
7 ... RPV pedestal, 8 ... lower wet well, 9 ...
Lower drywell, 10 ... Reactor containment vessel (RCC
V), 11 ... Diaphragm floor, 12 ... Piping, 13 ...
Valves, 14 ... Air conditioning ducts, 15 ... Bar arrangements, 16 ... RCCV penetrations, 17a, 17b ... Beams, 18 ... Large mobile crawler cranes, 19a, 19b, 19c ... Wires, 20 ... Suspension balance, 21 ... Stand, 22 ... RCCV joint pipe, 23 ... Suspended balance.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Matsuura 3-1-1, Saiwaicho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi factory (72) Inventor Masanori Chinen 3-chome, Saiwaicho, Hitachi, Ibaraki No. 2 in Hitachi Nuclear Engineering Co., Ltd. (72) Inventor Koichi Gota 3-1-1, Saiwaicho, Hitachi City, Ibaraki Prefecture Hitachi Ltd. Hitachi Factory (72) Inventor Naoto Yoshida Hitachi City, Ibaraki Prefecture Sachimachi 3-chome 1-1 Hitachi Ltd. Hitachi factory (72) Inventor Tatsuo Makita 1-1-14 Kanda, Uchida Plant Construction Co., Ltd. Chichida-ku, Tokyo (72) Inventor Sumito Maezawa 1-11-14 Kanda, Chiyoda-ku, Tokyo Inside Hiritsu Plant Construction Co., Ltd.

Claims (13)

[Claims] 1. A reactor containment vessel comprising a liner for a reactor containment vessel upper dry well assembled in a cylindrical shape, and a device / piping module inside the reactor containment vessel upper dry well arranged inside the liner. Module used for construction of upper drywell. 2. A reactor containment vessel in which a pipe inside a dry well of a reactor containment vessel and a cylindrical liner of an upper dry well of a reactor containment vessel are integrated by assembling the pipe into a pipe penetrating portion of the liner. Module used for construction of upper drywell. 3. A group of installed products in an upper drywell of a reactor containment vessel placed in a mutual positional relationship with each other, and a group of upper drywells of a nuclear reactor containment vessel placed in a mutual positional relationship with the installed product group. With a cylindrical liner, the piping in the installation product group is assembled to the liner pipe penetration portion,
A module used in a method of constructing a dry well of a reactor containment vessel, wherein the installed product group and the liner are integrated. 4. A cylindrical reactor shielding wall, a pipe whip structure attached to the reactor shielding wall, and a cylindrical liner of a reactor containment vessel upper dry well disposed around the pipe whip structure. When,
Equipment and piping in the reactor containment vessel supported in the pipe whip structure in a final installation positional relationship, and a part of the piping is installed in the pipe penetration portion of the liner upper dry well of the reactor containment vessel Module used in the construction method of. 5. The reactor containment according to any one of claims 1 to 4, wherein the cylindrical liner is provided along the outer periphery thereof with reinforcing rods which are elements constituting a reinforced concrete wall of the reactor containment vessel. Module used in the method of constructing a dry well on the top of a container. 6. The reactor according to claim 5, wherein a plurality of beams projecting outward are provided on the outer periphery of the cylindrical liner, and the beams intersect with the plurality of beams, and the reactor is arranged along the outer periphery of the cylindrical liner. A module used in the method of constructing a dry well in a reactor containment vessel equipped with reinforcements that are elements that make up the reinforced concrete wall of the containment vessel. 7. The containment vessel according to any one of claims 1 to 6, characterized in that the liner is engaged with a component member of a module located inside the liner. Module used for construction of upper drywell. 8. The member of the module according to claim 7, which is a pipe whip structure, wherein the member of the pipe whip structure is formed by a plurality of beams protruding inward from a cylindrical liner of a reactor containment upper drywell. A module used in the method for constructing a dry well of a reactor containment vessel, wherein the liner and the pipe whip structure are engaged with each other so as to be relatively movable in a horizontal direction. 9. A module for use in the method of constructing a dry well of a reactor containment vessel according to claim 1, wherein the module is used in a factory or a local ground structure yard at a reactor containment vessel construction site or Reactor to be assembled at both locations, and then to hoist the modules together at the site of the reactor containment construction site, and to hang and install above the lower drywell of the reactor containment vessel constructed earlier. How to construct the dry well above the PCV. 10. The method according to any one of claims 1 to 8 at a local assembling yard at a factory or a reactor containment vessel construction site, or at both locations.
The module used in the method for constructing a dry well of the reactor containment vessel upper part according to any one of 1 to 3 above, in which a beam of the diaphragm floor and a reinforcing bar of the diaphragm floor are incorporated to enlarge the module, and then the reactor storage A method for constructing an upper dry well of a reactor containment vessel, in which the above-mentioned large-sized modules are collectively hoisted at the site of a container construction site and are hung and installed above a lower dry well of the reactor containment vessel constructed earlier. 11. The module according to any one of claims 9 to 10, wherein a reinforcing bar constituting a reinforcing bar concrete wall of a reactor containment vessel is assembled along the outer periphery of a cylindrical liner to increase the size of the module. A method for constructing a dry well in a reactor containment vessel, wherein the module is lifted together with the reinforcement. 12. A configuration inside a dry well of a reactor containment vessel, a cylindrical liner of the dry well of a reactor containment vessel, a bar arrangement which is an element constituting a wall of the reactor containment vessel, and an inside of the liner. And a plurality of beams protruding from the liner on the outside and the outside, the pipe whip structure which is a configuration inside the reactor containment vessel upper dry well is movable in the cylindrical radial direction by the plurality of inside beams. It is sandwiched, and the reinforcing bars are arranged along the liner so as to intersect with the plurality of outer beams to form a module, and then the module is lifted up and above the lower drywell of the reactor containment vessel constructed earlier. And then concrete is applied to the outside of the liner to attach the outside beam and the reinforcing bar to the concrete. Construction method of setting for PCV upper drywell. 13. The method according to any one of claims 9 to 12, characterized in that, before the assembled module is lifted, cleaning of the pipes constituting the module and / or pressure resistance test is performed in advance. To construct a drywell above the containment vessel.