JPS60169797A - Method of construction of housing for nuclear power plant - 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] [Fields of Application of the Invention] Invention line, nuclear reactor building, control building, turbine building [Background of the Invention] When constructing a nuclear power plant building, conventionally, construction work was carried out prior to equipment installation work. Civil engineering and construction work was carried out,
After that, various equipment is installed in each room once the building has reached a certain level of strength, and the construction period takes approximately five years from the start of construction to the start of operation.

In this way, in the past, it took many years to construct a nuclear power plant building, which delayed the plant's start of operation. It is necessary to spend a great deal of time and effort on demolition and removal work, and even if partial improvements are made to the conventional construction methods mentioned above, it is extremely difficult to significantly shorten the construction period. The reality is that we have already reached our limits.

[Purpose of the invention]

In view of the above points, the present invention was made as a result of a fundamental review of the construction method for this type of building and repeated various studies. As a result, the construction period can be significantly shortened and plant operations can be started earlier, and the number of ancillary equipment handled at the construction site can be significantly reduced, making it an extremely economical nuclear power plant. It attempts to provide a construction method for rooms.

[Summary of the invention]

In order to achieve the above object, the present invention divides a nuclear power plant building into a plurality of building blocks and manufactures them in advance in a factory, equips each building block with the necessary equipment in advance in the factory, and then is characterized in that, in parallel with the manufacturing of the building blocks at a factory, reinforcing bars for reinforcing the plurality of building blocks are connected in advance by pouring concrete between predetermined positions together with reinforcing bars cast on-site in advance. be.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on the drawings. FIG. 1 is a longitudinal sectional view showing the internal structure of a nuclear power plant building;
Fig. 2 is a partially cutaway perspective view showing the internal structure of a reactor building block that constitutes one unit structure when proceeding with the construction method of the present invention, and Fig. 3 shows the relationship between the reactor building blocks constructed by the construction method of the present invention. FIG. 3 is a longitudinal sectional view showing a connected state.

In Figure 1, which shows the internal structure of a nuclear power plant building, the building is made of reinforced concrete and has many rooms (
Predetermined equipment 1 is installed in each room via a machine installation foundation 2. t'/c1 Each room has cable 4 inside.
A cable tray 3 containing a cable, an air conditioning duct 5, etc. are also attached.

In Figure 2, which shows the internal structure of a reactor building block that constitutes one unit structure for carrying out the construction method of the present invention, the same reference numerals as in Figure 1 refer to the same parts, and 6 denotes piping with valves and fittings in the middle of the system. The outside of the building block, which is internally equipped with necessary equipment such as mechanics or piping 6, is made of a steel container 7 with a reinforcing lip 8. Therefore, in the present invention, the plurality of building blocks made of the above-mentioned steel containers 7 are manufactured in advance at a factory, and necessary equipment such as mechanics or piping 6 is also installed in advance at the factory. On the other hand, at the construction site of a nuclear power plant, reinforcing bars for reinforcing between these building blocks are arranged in advance at predetermined positions in parallel with the above-mentioned building blocks and factory fabrication. Once the on-site casting of reinforcing bars has been completed as described above, the factory-fabricated building blocks are delivered to the construction site and concrete is poured between each block along with the reinforcing bars. The state is shown in FIG. In FIG. 3, the same reference numerals as in FIGS. 1 and 2 indicate the same parts, and 9 indicates reinforcing bars. In addition, in order to connect the cable trays 3, cables 4, air conditioning ducts 5, piping 6, etc. installed in each building block, reinforcing bars 9 are cast on-site at the same time as the building block is manufactured at the factory. On the occasion of the third
A sleeve indicated by reference numeral 10 in the figure is installed and fixed in a predetermined position in advance, and after concrete is poured, the space inside the sleeve is used to connect the wiring system between each building block.
Just connect the piping system. Additionally, when pouring concrete between multiple building blocks that have been delivered to the construction site, it is sufficient to attach a backing to the opening door of each building block and to lock the door with a key.
By performing the simple sealing work described above, it is possible to prevent concrete liquid from penetrating into the building blocks.

〔Effect of the invention〕

The present invention is as described above, and according to the present invention, various effects as listed below are achieved. be able to.

(1) Since the nuclear power plant building is divided into multiple building blocks and prefabricated at the factory, corrosion-resistant coating inside the building can be done at the stage when each building block is manufactured at the factory, compared to the conventional method. Painting work at the construction site can be omitted.

(2) By adopting large building blocks that can also be used as concrete formwork, there is no need to transport, assemble, dismantle, or remove the formwork before or after concrete pouring, and there is no need to maintain the accompanying formwork. No work is required.

(3) At the same time as the building blocks are manufactured at the factory, the necessary equipment for each building block is also pre-equipped at the factory, which greatly reduces the number of parts handled at the construction site. When constructing a 1,100 MWe class nuclear power plant, conventionally it took about 52 months from the start of mat laying to the time of fuel loading (excluding the total test run period), but according to the present invention, , the period was about 30 months [critical path method (crilicll method)]
(by planning based on the path method).

(4) Transporting, assembling, dismantling, and removing scaffolding at the construction site is almost unnecessary.

(5) As the construction period for plant buildings is shortened, storage of various auxiliary equipment at the construction site in yards is also shortened, making it easier to take anti-rust measures for the auxiliary equipment mentioned above.

(6) Due to the above-mentioned reason (3), the flushing and pressure test of the piping system, as well as the bell check and sequence test of the wiring system, can be performed by the factory.

(7) Similarly, for the reason mentioned in (3) above, the number of parts of the belt-holding equipment stored in the yard is significantly reduced, so there is no need to secure a huge area of ancillary equipment storage yard.

As detailed above, according to the present invention, by adopting a construction method that is completely different from the conventional method, it is possible to significantly shorten the construction period and realize an earlier start of plant operation. It is possible to obtain an economically efficient construction method for a nuclear power plant building that significantly reduces the amount of various auxiliary equipment that must be handled.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing the internal structure of a nuclear power plant building, and FIG. 2 is a partially cutaway perspective view showing the internal structure of a reactor building block that constitutes one unit structure in proceeding with the construction method of the present invention. FIG. 3 is a longitudinal sectional view showing the state of connection between reactor building blocks constructed by the construction method of the present invention. 1... Equipment, 2... Machine installation foundation, 3... Cable tray, 4... Cable, 5... Air conditioning duct, 6
... Piping, 7... Steel container, 8... Reinforcement lip, 9
...Reinforcing bar, 10...Sleeve. Agent Patent Attorney Hiroo Nagasaki 1゜ (and 1 other person) No. ! Mouth dream 21! ]

Claims (1)

[Claims] 1. The nuclear power plant room is divided into multiple building blocks and fabricated in advance at the factory, and the necessary equipment for each building block is also equipped in advance at the factory.
On the other hand, at the construction site, in parallel with the factory fabrication of the building blocks mentioned above, reinforcing bars for reinforcing between these multiple building blocks are placed in advance at predetermined positions, and the factory-fabricated building blocks are transported to the construction site. A construction method for nuclear power plant buildings, which is characterized by connecting each building block by pouring concrete together with reinforcing bars cast on-site in advance after the building blocks have been delivered to the site.