JPH05107381A - Method for constructing nuclear power plant reactor - Google Patents

Abstract

PURPOSE:To shorten the construction period of a prefabricated nuclear power plant by omitting the field erection of the plant. CONSTITUTION:The outer peripheral area of a reactor container is partitioned into several units on a nuclear reactor building base mat 11 and steel boxes in which equipment, piping and electric components to be disposed in each unit are stored are fabricated as first to sixth unit modules 1-6 in a factory. The unit modules 1-6 are installed on the nuclear reactor building base mat 11 at a construction site. The boxes facing the reactor container are joined together and the reactor container is covered at its upper side with confinement modules 7-9 and the confinement modules 7-9 are placed on the box walls of the unit modules 1-6 and joined together. During the process of installing the unit modules 1-6 a nuclear reaction module 12 with which the reactor container and a reactor core main body are fabricated integrally is installed on the nuclear reactor building base mat 11. The unit modules 1-6, the confinement modules 7-9, and the nuclear reactor module 12 are installed on the nuclear reactor building base mat 11 and are joined together and then the work of connecting piping and electrical wiring among the modules is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a reactor building for accommodating a reactor module by connecting a framework and a box of equipment modules installed / fixed on a base mat of a reactor building, and is suitable for medium- and small-sized reactors. Method of constructing a nuclear power plant.

[0002]

2. Description of the Related Art A reactor containment vessel and a reactor body contained therein are integrated and manufactured in a manufacturing plant, transported by barge at sea, and transported by a large transporter and rolled onto a base mat of a reactor building. Production and installation method is medium
A total weight of up to 3000 tons is possible for small nuclear reactors.

In this case, the configuration of a nuclear power plant in which the equipment room constructed on the base mat of the reactor building is a conventionally known reinforced concrete building is shown in FIGS. 3 and 4.
Explained by.

That is, as shown in FIGS. 3 (b) and 3 (c), a reinforced concrete reactor building base mat
A reactor module 12, which is integrated and manufactured in a batch at a manufacturing plant, is installed on the upper part 11, and a girder-shaped reinforced concrete equipment room 13 is built around it. Above the reactor module 12, a confinement structure 14 is built on the top of the equipment room 13 and covered.

The reactor module 12 includes a reactor containment vessel,
It is composed of a contained reactor body and a steel frame that supports this reactor body, is manufactured at a manufacturing plant, and can be transported to the site as a unit.
For 500,000 KWe small and medium-sized nuclear reactors, the total weight is about 3000 tons.

[0006] In order to install the reactor module 12 of about 3000 tons on the reactor building base mat 11, the capacity of the hanging-type lifting machine is greatly exceeded. Pull it to the center above. At this time, it is impossible to pull in the reactor module 12 if the double girder-shaped reinforced concrete equipment room 13 is completed, and if the construction of the equipment room is postponed only at the lead-in port, the reinforced concrete wall / floor will be built. , The wall and floor of the reinforced concrete equipment room where the concrete drying process is already completed,
It becomes a series with the concrete drying process, prolonging the construction period. Therefore, after pulling the reactor module 12 onto the reactor building base mat 11, a double girder-shaped reinforced concrete equipment room 13 is built, and further a confinement structure 14 is provided on the top of the reactor room 12 to cover the reactor module 12. To construct. Equipment, piping and electrical equipment will be installed and cables will be laid in the completed reinforced concrete equipment room 13. Finally, the reactor module 12 and the surrounding system equipment are connected to complete the plant installation.

The construction process described above is shown in FIG. In the figure, the horizontal axis shows the period from the start of the plant to the completion in months, and the vertical axis shows the construction items of each process. As is clear from Fig. 4, it takes 6 months from the start of equipment production to bedrock inspection, and 36 months (3 years) until the plant installation is completed. In other words, the reactor module will be factory-manufactured at the beginning of equipment manufacturing, and the reactor module will be completed in about 15 months. In parallel with this process, rock mass inspection will be conducted 6 months later, and then the reactor building base mat placing work will be performed. After completion of this placement work, the reactor modules will be transported and installation work will be performed. After the installation work of the reactor module is completed, the equipment room construction work (9 months), the equipment room mechanical / electrical work (6 months), and the finishing work (4 months) will be completed before the plant installation. This entire construction period takes 3 years.

[0008]

Integrated production of the reactor containment vessel and the reactor body at a manufacturing plant is extremely effective in significantly reducing the amount of work for installing local equipment. However, if the equipment room 13 is made of conventional reinforced concrete, each reinforced concrete wall and floor layer is used to complete the equipment room skeleton that is required until the installation of equipment piping arranged on the outer periphery of the reactor containment vessel is started. It will take about 10 months to build. Also, during this period, there is interference with building work due to the installation of advanced equipment, etc., and despite the integrated batch production of the reactor containment vessel and the reactor body at the manufacturing plant, there is an effect of reducing the amount of on-site work. Not demonstrated. Furthermore, the time to install the reactor containment vessel and the reactor body, which were integrated and manufactured together at the manufacturing plant, on-site is the early stage of the on-site construction process. There are issues such as the inability to expect a sufficient reduction in the total construction period from the start of production at the factory to the completion of installation of the entire plant equipment locally.

The present invention has been made to solve the above problems, and in a method of constructing a nuclear plant in which a reactor containment vessel and a reactor main body are integrally manufactured in a manufacturing plant, not only in the on-site construction period but also in the manufacturing plant. A nuclear plant construction method that can shorten both the total construction period from the start of production to the completion of installation of the entire plant equipment locally, and can significantly reduce the amount of equipment installation work and construction work locally To provide.

[0010]

According to the present invention, there is provided a process of dividing an outer peripheral region of a reactor containment vessel into several sections on a reactor building base mat, and equipment / pipes and electric parts arranged in each of the several sections. A step of manufacturing the stored compartment modules in a manufacturing plant, a step of sequentially loading and installing the compartment modules on the reactor building base mat, and covering the upper part of the reactor containment vessel with a confinement box, A step of mounting and joining a box on the compartment module, a step of installing the reactor module on the reactor building base mat during a step of sequentially installing the compartment module, the compartment module, the confinement box and the reactor module Installation and joining of the components on the base mat of the reactor building, piping and electrical connection between the modules. Characterized in that comprising the step of performing wiring work.

[0011]

According to the present invention, the framework of the equipment modules installed and fixed on the base mat of the reactor building and the boxes are combined to form the reactor building which houses the reactor modules. That is, the equipment, pipes, and electrical equipment installed around the outer periphery of the reactor module and the area of the room body that houses and supports the equipment are divided into several sections. Each of the sections will be a facility module for each section that will be manufactured in a batch at the manufacturing plant, transported to the installation site of the reactor, and carried in and fixed on the reactor building base mat. Then, the equipment modules for each section are joined together and airtightly joined to form a confinement region for accommodating the reactor module. As a result, the functions of the reactor building are retained, and the effects of reducing the construction period of the entire plant and reducing the amount of local equipment installation work when the reactor containment vessel and the reactor main body are integrated and manufactured at the manufacturing plant are integrated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a nuclear power plant construction method according to the present invention will be described with reference to FIGS. 1 shows a schematic structure of a nuclear power plant constructed by the method of the present invention, and FIG. 1 (a) is a plan view.
(B) shows the AA arrow cross section of (a), (c) has shown the BB cross section of (a).

That is, on a nuclear building base mat 11 made of reinforced concrete, a reactor module 12 and first to sixth partition modules 1, 2, 3, 4, 5, 6 which are integrally manufactured in a manufacturing plant, respectively, are manufactured. , And the first to third confinement modules 7, 8, 9 are installed.

The reactor module 12 includes a reactor containment vessel,
This is composed of the internal reactor body and the steel frame that supports the reactor body, and it is manufactured and assembled at the manufacturing plant and can be transported to the site together.

First to sixth partition modules 1, 2,
3, 4, 5 and 6 are installed on the outer periphery of the reactor module 12 and are connected to each other so as to perform a system function. Each of the compartment modules 1 to 6 is a steel frame box and the equipment and piping contained therein. It is made up of electrical components and electrical components, is manufactured and assembled at a manufacturing plant, and can be transported to the site as a unit.

The first to third confinement modules 7, 8 and 9 cover the upper part of the reactor module 12 and
To the top of the sixth partition module 1, 2, 3, 4, 5, 6 to form the central roof enclosure of the reactor building, which can be integrated into the manufacturing plant as a box of a steel frame or several The module, which is manufactured as a structure and can be transported to the site as it is, is manufactured at the manufacturing plant, and the modules transported to the site by barge are installed on the reactor building base mat in the following order. That is, the first to fifth partition modules 1, 2,
Install 3, 4, and 5 in a U-shape on the reactor building base mat 11 with a large transporter and rolling in order. Next, the first to third confinement modules 7, 8 and 9 are sequentially mounted and fixed on the tops of the partition modules 1 to 5 by a crane vehicle. Reactor module delivered to the vicinity of the reactor building base mat 11 using a large transporter
12 is rolled in between the 4th and 5th compartment modules 4 and 5 and fixed to the central portion on the reactor building base mat 11 by fixing. Sixth between the fourth and fifth compartment modules 4 and 5
Rolling in the compartment module 6 of. The first to sixth partition modules 1 to 6 and the first to third confinement modules 7, 8 and 9 are connected to each other and airtight bonding is performed. Finally, the connection work between the modules and the electrical wiring is performed. A nuclear power plant is constructed through these processes.

FIG. 2 is a construction process diagram of a nuclear power plant according to the present invention, in which the horizontal axis represents the period and the vertical axis represents the construction items. As is clear from FIG. 2, it takes 24 months (2 years) from the start of equipment production and rock inspection to the completion of plant installation, which is completed in two-thirds of the three years of the conventional example.
That is, the factory building of the partition module is performed in parallel with the reactor building base mat placing work and the reactor module factory manufacturing work, and after the completion of the reactor building base mat placing work, the first to fifth partition modules 1 ~ 5 installation is done. The reactor module is then transported and installed, installing the sixth compartment module 6. The period so far is 18 months. Finally, the inter-module connection and shielding concrete are injected, and after the finishing work, the installation of the nuclear power plant is completed. The entire construction period according to this embodiment is 24 months.

According to the above embodiment, there are the following effects. In other words, by installing various modules that were manufactured in a batch at the manufacturing plant on the reactor base mat, there is no need for reinforced concrete walls and floors, and the amount of equipment, pipes, and cables to be installed on site has been significantly reduced, resulting in a Can be shortened. Since the on-site delivery time of the reactor module is set to the end of each module delivery, the lead time before bedrock inspection for reactor module production can be shortened.
It is possible to shorten the total construction period from the start of production at the manufacturing plant to the completion of local plant installation.

The present invention relates to the installation order of each module on the base mat of the reactor building in the above-mentioned embodiment, so as to secure the factory manufacturing period of the reactor module for a long period without changing the construction period of the whole plant, A step of setting the installation of the equipment module first and delaying the installation time of the reactor module can be provided.

In addition, of the total number of equipment modules for each section,
Preliminarily installed except for one module, forming an opening section in the surrounding area on the reactor building base mat, and providing a process that allows the reactor module to be pulled in and carried onto the reactor building base mat by rolling etc. be able to.

[0021]

The effects of the present invention are as follows. (1) The total construction period from the start of reactor module production at the manufacturing plant to the completion of plant installation on site will be about 24 months instead of about 36 months of the conventional example, and the construction period can be shortened by about 12 months. (2) The period from the rock mass inspection to the completion of nuclear plant installation will be about 24 months instead of about 30 months of the conventional example, and the construction period can be shortened by about 6 months. (3) Local equipment installation man-hours will be significantly reduced, and the production part at the manufacturing plant will be significantly expanded, which will be advantageous in ensuring quality.

[Brief description of drawings]

1A is a plan view schematically showing an embodiment of a method for constructing a nuclear power plant according to the present invention, FIG. 1B is a vertical cross-sectional view showing the direction of arrow AA in FIG. c) is (a)
FIG. 6 is a vertical cross-sectional view showing the direction of arrow BB in FIG.

FIG. 2 is a process diagram showing a construction process of the nuclear power plant in FIG.

FIG. 3A is a plan view schematically showing a conventional nuclear power plant construction method, FIG. 3B is a vertical cross-sectional view taken along the line AA in FIG. 3A, and FIG. FIG. 6 is a vertical cross-sectional view showing the direction of arrow BB in FIG.

FIG. 4 is a process diagram showing a construction process of the nuclear power plant in FIG.

[Explanation of symbols]

1, 2, 3, 4, 5, 6 ... First to sixth compartment modules, 7, 8, 9 ... First to third confinement modules, 11 ... Reactor building base mat, 12 ... Reactor Module, 13 ... Equipment room, 14 ... Confinement structure.

Claims (1)

[Claims] 1. A manufacturing plant of a step of dividing an outer peripheral region of a reactor containment vessel into several sections on a base mat of a reactor building, and a section module accommodating equipment / pipes and electrical parts arranged in each of the number sections. The process of manufacturing the compartment module, the step of sequentially loading and installing the compartment module on the reactor building base mat, the upper part of the reactor containment vessel is covered with a confinement box, and the confinement box is mounted on the compartment module. And joining, the step of installing the reactor module on the reactor building base mat during the step of sequentially installing the partition module, the step of installing the partition module, the confinement box and the reactor module into the reactor building base mat The process of installing and joining on top, the process of piping and electrical wiring between the modules A method for constructing a nuclear power plant, which comprises: