JPS61102592A - Package control chamber and method of installing said control chamber - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a control room, and particularly to a control room suitable for packaging.

[Background of the invention]

Nuclear power plants have a concrete structure for earthquake resistance and radiation protection purposes. Conventionally, the central control room in this state is constructed by installing a floor duct in the floor of a concrete building, as shown in Japanese Patent Application Laid-Open No. 56-74696 and No. 58-140686, and a floor duct is installed in the floor of the concrete building, and a cable cable is placed inside the floor duct. It was a construction method for laying.

There are also cases where the panel in the - row and the surrounding floor duct are assembled as a set and transported and installed after manufacturing at the factory.

Recently, there has been a great need to shorten the construction process of nuclear power plants, and there is a need to significantly shorten the process.

However, in these cases, the work is done in sequence, and it is difficult to shorten the process, so improvements in this area were essential.

Related patents include JP-A-56-74696 and JP-A-58-140686.

[Purpose of the invention]

An object of the present invention is to provide a bunker control room and its installation method that can prevent moisture from entering during concrete pouring.

[Summary of the invention]

A feature of the present invention is that a gas supply pipe is provided that communicates with a control room space surrounded by partition plates installed on a floor member on which a control panel is installed.

Another feature of the present invention is that a control room is assembled by installing partition plates on the floor member on which the control panel is installed, and this control room is installed on the floor of the building, and the inside of the control room is maintained in a pressurized state to control the control room. The purpose is to pour concrete around the room.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a vertical sectional view of this embodiment, and FIG. 2 is a horizontal sectional view of its arrangement.

The package control room 24 is constructed using the floor duct 1 as a foundation part, and the wiring between the control panels 2 and between the control panels 2 and the middle 4 terminals B3 is laid inside the floor duct 1.

The floor duct 1 of the package control room 24 can have various structures, but a structure in which machined steel sections 4 are combined in a cross pattern as shown in FIG. It has sufficient strength. The floor duct 1 is made up of a shaped steel 4, a lid 5, and a bottom 6, and the wiring 7 is passed through the floor duct 1.

A reinforcing member 8 (FIG. 1) is attached to the floor duct 1 constructed in this way, and a sealing plate 9, which is a plate that partitions the control room space and the space outside thereof, is attached around the entire circumference thereof. The seal plate 9 (control room wall) also serves as a concrete form, and also prevents moisture from entering during concrete pouring and also prevents rainwater from entering during that period. A hanging fitting 10 is attached to the upper part of the reinforcing member 8. This hanging fitting 10 is used when the control room of this embodiment is hung on-site, and after the concrete corresponding to the ceiling is poured, it is used to hang the package control room 2 of this embodiment.
4, and prevents the package control room from being shaken during an earthquake.

Inside the pan cage control room 24, that is, inside the control room space 27 surrounded by the seal plate 9, the control panel 2 and the relay terminal board 3 are installed, and then the wiring 7 is installed. Furthermore, a complete set of interior accessories such as a ceiling 11, lighting fixtures 12, air conditioning ducts 13, and broadcast speakers 14 are attached to the upper part. However, this package control room 24 requires concrete pouring around it after installation. The seal plate 9 is reliably connected by welding or the like. However, due to concrete being poured around the package control room ;b
It is expected that water (water attached to the concrete that has been placed) will enter the interior of lJ Omuro 24. For this purpose, a pressurized gas supply pipe 19 for supplying pressurized air inside is provided to penetrate the seal plate 9 (control chamber wall). When pouring concrete,
Pressurized air is supplied inside through the pressurized gas supply pipe 19.

The structure shown in FIG. 1 can be assembled as the package control room 24 outside the building in parallel with the building construction, so that it is possible to carry out the construction work in parallel with other works of the reactor plant construction.

FIG. 4 shows the state of connection between the pressurized gas supply pipe 19 provided in the package control chamber 24 and the pressurizing device 21. As shown in FIG. The pressurizing device 21 is detachably connected to the gas supply pipe 19 via a pipe 22 . That is, the piping 22 and the gas supply pipe 19 are removably connected to each other by seven flanges (not shown). A pressure gauge 20 and pulp 23 are provided in the piping 22.

Although the piping 22 and the gas supply pipe 19 are connected in FIG. 4, these pipes are actually connected after the package control room 24' is installed at a predetermined position in the reactor building.

FIG. 5 shows the installation procedure of the package control room 24 of this embodiment. First, as shown in FIG. 5(I), the floor 15 of the reactor building where the package control room 24 is installed
Concrete is poured until the concrete is poured and then allowed to cure for a specified period of time. 17 is a hole through which the cable is passed. After the concrete has hardened, the package control room 24 assembled near the plant installation site is lifted up by a crane (hanging fittings 10
(suspended by a crane) on the building floor 15 (see Figure 5 (
In). After installing the pan cage control room 24, the gas supply pipe 19 and the piping 22 are connected. Package control room 24
The sealing plate 9 is used as a concrete formwork for the negative side of the reactor building wall, and the opposing concrete formwork for the other side is installed on the building floor 15.

Then, reinforcement is arranged between the installed concrete formwork and the seal plate 9, and concrete is poured between them. Furthermore, concrete is also placed on the 7-rule plate 9 above the package control room 24. The concrete portion on this seal plate 9 becomes the floor of the upper floor of the package control room 24.

In this way, the building wall 25 surrounding the package control room 24 is created [FIG. 5(2)]. In parallel with the concrete pouring of the building wall 5, the cable 7 between the control panel 2 and the cable room located below it is being laid.

When pouring concrete around the package control room 24 as described above, the pressurizing device (for example, an air compressor) 21 is driven to pour concrete into the package control room 24 through the piping 22 and the gas supply pipe 19. Introduce pressurized air into the By introducing pressurized air into the package control chamber 24, moisture contained in poured concrete can be prevented from entering the package control chamber 24. Since the package control room 24 has relationships with external equipment such as external cable connections and ventilation air conditioning equipment, it is difficult to create a completely sealed structure by welding the seal plates 9 together. , a slight gap is formed.

Therefore, since pressurized air is introduced into the package control chamber 24 during concrete pouring as in this embodiment, it is possible to prevent moisture from entering the package control chamber 24 during concrete pouring. After the concrete wall around the package control room 24 has hardened, the pipe 22 is removed from the gas supply pipe 19 and the gas supply pipe 19 is sealed. FIG. 7 shows the state after the installed package control room 24 is surrounded by concrete placed around it. The hanging fittings 10 of the package control room 24 are buried in the concrete of the ceiling.

As a result, the earthquake resistance of the concrete in the ceiling above the package control room 24 can be improved.

FIG. 6 shows a conventional control room construction procedure. After the poured concrete for the building floor 15 hardens, the concrete +! that will become the side walls and ceiling of the control room is placed on the upper part of the building floor 15! ! 26
is constructed by pouring concrete using concrete formwork [Figure 6 (I)].

The inside of the concrete wall 26 becomes a control room. After the concrete of the concrete wall 26 has hardened, the concrete formwork is removed, and the interior work inside the control room 27 and the installation work of the control panel 2 are performed [Fig. 6 (T)]. Concrete pouring for the room on the floor above the control room 27 and laying work for the cable 7 are then carried out [Fig. 6 (■)].

In the embodiment described above, the package control room 24 is located on the building floor 15.
Although the piping 22 and the gas supply pipe 19 are connected after the installation of the package control room 24 near the reactor building construction site, the piping 22 and the gas supply pipe 19 may be connected after the package control room 24 is assembled near the reactor building construction site. In this case, by supplying pressurized air from the pressurizing device 21 into the package control chamber 24 after assembly is completed,
Rainwater can be prevented from entering the package control room 24 after assembly is completed. Package control room 2 after assembly is completed
When pressurized air can be supplied into the package control room 4, the piping 22 is made of a flexible tube that can withstand high pressure in order to facilitate movement of the package control room 24 to the building floor 15 by crane.

Alternatively, since the moving time of the package control room 24 is short, the pipe 22 and the gas supply pipe 19 may be disconnected during the movement, and these pipes may be reconnected after the installation of the package control room 24 on the building floor 15 is completed. good.

One of the features of this embodiment is the lifting of the package control chamber 24, which is a heavy object. This is carried out using a large crane, and recent plants are capable of lifting up to 750 ToN.

FIG. 8 is a fixed conceptual diagram of the package control room 24.

The steady state load W can be withstood while it is placed on the floor. If an earthquake occurs in this state, the horizontal acceleration gh
Therefore, a horizontal force equivalent to Wgh acts. Furthermore, Wg2v works similarly in the vertical direction. In this embodiment, as described above, the side and top surfaces of the package control room 24 are buried in a concrete enclosure, so basically, vibrations caused by an earthquake can be fixed in the reactor building. However, it is possible that a slight gap may occur due to the difference in thermal expansion between the concrete and the sealing plate 9 of the package control room 24, so if necessary, the studs 16 are attached as fixing members to the side and ceiling surfaces.

By the way, if the horizontal acceleration due to the ground WK is gh = IG, the horizontal force = Wgh = 500
For 20φ round steel, 39 studs 16 of 500.000/-X20"X41 are installed on both sides. In the vertical direction, the current g v = 0.5 G or less, and jumping up from the floor is not considered. You don't have to.

FIG. 9 is a conceptual diagram of cable construction in this embodiment.

As shown in FIG. 2, the cable between the control panel 2 and the relay terminal board 3 has already been laid in the package control room 24 of this embodiment. Therefore, when constructing a reactor building, building floor 1
5, drill holes 17 in the necessary locations in advance. After the package control room 24 is installed, the cable wiring 7 that passes through the hole 17 and reaches the site will be installed by the individual.

A block diagram of this cable wiring 7 is shown in FIG.

The cable wiring 7 from the control panel 2 includes various types of cables, such as those for plant operation instruction signals to the field equipment 18 and the panel, and signals sent from the field to the control panel 2 to notify the status of equipment at the field site. be. In order to form a prefabricated package, it is necessary to cut off one end of these, and a relay terminal board 3 is provided in the package control room 24. Therefore, all the cable wiring 7 going back and forth to and from the site is laid from this relay terminal board 3 as a starting point.

The electrical circuit for laying this cable will be installed in parallel with the completion of reactor 17!3, and the package control room 2
At the rear of the installation in step 4, make sure that cables can be laid at the site.

According to this embodiment, since the construction of the reactor building and the assembly of the package control room can be performed in parallel, there is a great effect in shortening the process.

Figure 11 shows the main control room portion of the electronic power plant construction process. In conventional construction (Fig. 11 (to)), the building was built one after another starting from the basement floor, and after completing the floor, walls, and ceiling of the control room, it took about six months to finish the interior.

Installation of the control panel took place after that and took approximately two months. Wiring to the on-site equipment came after that, and it took about six months to complete, and after completing the necessary cable installations, trial operation of each equipment began.

According to this embodiment, as shown in FIG. 11(B), the construction work of the building and the assembly work of the package control room 24 are performed in parallel at different locations. The installation of the control room 24 will be completed in about one month (the work will be completed only by hoisting it up using a crane, but we assume that it will take one month to be flexible). The subsequent cable work in this example will be carried out as much as possible in advance, and if only the connection to the relay terminal board 3 in the package control room is left, the connection period will be approximately 1.
It will be put on a test run in a few months. If a nuclear power plant is constructed using the package control room 24 according to this embodiment, it will be possible to shorten the electrical work by about 12 months.

Furthermore, according to this embodiment, it is possible to prevent moisture from entering the package control chamber 24 as described above.

〔Effect of the invention〕

According to the present invention, since the inside of the package control chamber can be pressurized, moisture can be prevented from entering the package control chamber during concrete pouring, and the reliability of equipment in the package control chamber can be improved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a package control chamber according to a preferred embodiment of the present invention, FIG. 2 is a cross-sectional view of the package control chamber of FIG. 1, and FIG. 4 is a cross-sectional view of the package control chamber of FIG. Structural diagram showing the connection state between the gas supply pipe and the pressurizing device, Figure 5 (I)
- [phase] is an explanatory diagram showing the installation plan of the package control room in the atomic PM shop in Fig. 1, and Fig. 6 (I) to (g) are explanatory diagrams showing the construction plain of the conventional control room. Figure 7 is a local vertical cross-sectional view of the reactor wing building incorporating the package control room shown in Figure 1;
Figure 8 is an explanatory diagram showing the concept of the fixed state of the package control room in Figure 1, Figure 9 is a conceptual diagram of cable construction when using the package control room in Figure 1, and Figure 10 is an explanatory diagram showing the concept of the fixed state of the package control room in Figure 1.
A block diagram of cable wiring when using the package control room shown in the figure is shown. FIG. 11(3) is an explanatory diagram showing the construction process of a conventional control room, and FIG. 11 [F]) is an explanatory diagram showing the construction process when the package control room of FIG. 1 is used. 1... Floor duct, 2... Central control panel, 3...
Relay terminal board, 9... Seal plate, 13... Air conditioning duct, 15... @ room floor, 17... Hole, 19... Gas supply pipe, 20... Pressure gauge, 21...・Pressure device, 24・
...Package control room. 1st z strategy 3I21 also 4(2N's 5 z V-I Cz (T) (II) ('NI
)8,?躬 l0ffi Ding further luck L-11, - Brehaf.

Claims (1)

[Claims] 1. A floor member on which a control panel is installed, a partition plate installed on the floor member and serving as a side wall and ceiling member of the control room space, and a gas supply pipe connected to the control room space. Package control room consisting of. 2. Assemble a control room comprising a partition plate that defines a control room space on a floor member on which a control panel is installed, install the assembled control room on the building floor, and pressurize the installed control room. A method for installing a package control room, in which the control room is held in place and concrete is poured around the control room.