JPH10115692A - Nuclear power plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable installation of a plurality of nuclear reactors inside a site and also to improve safety and to reduce the cost of construction by a method wherein a plurality of reactor containers holding a plurality of reactor vessels respectively are held inside a reactor building. SOLUTION: Inside a virtually columnar reactor building 20, two secondary containments 3 are held and a central separation wall 21 is provided between them. Reactor containers 2 are provided inside the two secondary containments 3 respectively and pressure suppression pools 4 are provided inside these containers respectively. Moreover, reactor pressure vessels 1 being reactor vessels are provided inside the containers 2 and reactor cores are held inside the pressure vessels 1 respectively. Since two nuclear reactors are held in one building 20 in this way, a distance from the building 20 to the boundary of a site can be ensured sufficiently, it is unnecessary to enlarge the wall thickness of the building 20 so as to enhance the effect of shielding from radiation, and an increase in the weight of the building 20 can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nuclear power plant, and more particularly to a nuclear power plant in which a plurality of nuclear reactors are installed on a site.

[0002]

2. Description of the Related Art FIG. 15 is a longitudinal sectional view showing an improved boiling water reactor (ABWR) which is one of conventional nuclear power plants. As shown in FIG. 15, the reactor building 100
Inside a reactor pressure vessel 1 which is a reactor vessel
The reactor pressure vessel 1 is housed inside a reactor containment vessel 2. Further, a secondary containment facility 3 is provided so as to surround the containment vessel 2, and inside the secondary containment facility 3, facilities that are important for operating the reactor and are used in the event of an accident. Important safety-related equipment and important equipment for maintenance and inspection are stored. Further, the secondary containment facility 3 also functions as a barrier against the diffusion of radioactive materials at the time of an accident. A pressure suppression pool 4 is provided inside the reactor containment vessel 2,
This suppression pool 4 is in a loss of coolant accident (LOCA).
At the same time, it has a function of condensing the steam released into the containment vessel 2 to suppress an increase in the internal pressure of the containment vessel 2. In addition, as the shape of the conventional reactor building, there are a shape having a columnar overall shape, a shape having a square horizontal sectional shape, and the like.

[0003] Sites (sites) where nuclear reactors are installed
Is deep, the reactor building 100 is buried deep underground. When the reactor building 100 is buried deep in the ground and installed as described above, since the influence of the earth pressure and the water pressure is greater than in a normal case, the entire shape of the reactor building 100 may be adopted, Alternatively, it is conceivable to adopt a reactor building 100 having a square cross section and make its outer wall thicker than usual so that the reactor building 100 can withstand a large earth pressure.

[0004] In addition, in order to make useful use of the site, etc.
In some cases, a plurality of reactors are installed at one site. In this case, the reactor building 10 shown in FIG.
0 is set. When the rock level at the site where a plurality of reactors are installed is deep, it is necessary to secure a sufficient interval between the reactor buildings 100, 100 as shown in FIG. This is because, when the reactor building 100 is installed, it is necessary to perform deep excavation up to the bedrock level, and it is necessary to equalize the soil water pressure applied to the reactor building 100.
This is because it is necessary to effectively exhibit the embedding effect. In addition, turbine buildings 5 and 5 are provided adjacent to the reactor buildings 100 and 100, and a waste treatment building 6 and a service building 7 are provided between the turbine buildings 5 and 5. In FIG. 16, reference numeral 8 denotes a site boundary.

[0005]

However, when a plurality of reactors are installed on one site, it is necessary to install a reactor building 100 for each reactor as described above. Since it is necessary to ensure a sufficient interval between the reactors 100, 100, the distance between the reactor building 100 and the site boundary 8 becomes short when the site area is small.
Here, the distance between the reactor building 100 and the site boundary 8 is an important factor in the public exposure evaluation, but when this distance is short, in order to enhance the radiation shielding effect of the reactor building 100, It is necessary to increase the wall thickness of the reactor building 100. However, when the wall thickness of the reactor building 100 is increased, the weight of the above-ground portion of the reactor building 100 increases, so that the stability of the reactor building at the time of an earthquake or the like may be deteriorated.

[0006] For this reason, when a plurality of reactors are installed on a small-area site, a plurality of reactor buildings 100, 100 are replaced with a conventional system in which the interval between the reactor buildings 100 must be increased. There has been a demand for a method of arranging 100 in one place as much as possible.

As one of such systems, a system in which two reactor buildings 100 are integrated into one reactor building can be considered. An example of this scheme is shown in FIG. 17, where two reactor buildings 100, 10
0 is integrated into one reactor building 101 having a rectangular cross section.
The reactor building 101 is provided with two reactor containment vessels 2, 2.

However, as described above, the two reactor buildings 1
In the system in which 00 and 100 are integrated, when an internal earthquake-resistant wall is installed as a countermeasure against soil water pressure load, the amount of wall differs in two directions orthogonal to each other in a horizontal plane.
As shown in FIG. 7, when two reactor containment vessels 2 and 2 are installed in the reactor building 101 having a rectangular cross section, characteristics such as the structure of the reactor building 101 and the stability of the building at the time of an earthquake occur. Two orthogonal directions of the furnace building 101 (long side direction and short side direction)
However, there is a problem that the design of the reactor building becomes significantly complicated.

[0009] The conventional reactor building illustrated in FIG. 16 also has the following problem. In other words, when multiple reactors are installed on one site, a tie line is provided between the system of one reactor and the system of the other reactor so that each system can be used as a backup and It is conceivable to improve the safety margin of the vehicle. However,
In conventional reactor buildings, it was necessary to install outdoor trenches between reactor buildings, and to install connecting pipes in these outdoor trenches, so the relative displacement between reactor buildings when an earthquake occurred was taken into account. However, there is a problem that the manufacturing cost increases.

[0010] Further, as described above, when an attempt is made to share equipment between a plurality of reactors, a communication route (such as a communication pipe and a communication cable between system equipment, and a movement of personnel and physical quantities) between the reactors. Passage) must be secured. For this reason, it is necessary to absorb the relative displacement at the time of the occurrence of the earthquake or the long-term relative displacement, and there is a possibility that workability such as maintenance work may be deteriorated and manufacturing costs may be further increased.

Further, since the central control room of the nuclear power plant and its related equipment are important equipment (seismic class As) for ensuring the safety of the nuclear reactor, the building that houses the central control room and the like is supported by rock. Need to be. For this reason,
For example, in the case of a site having a deep bedrock, a building accommodating the central control room 9 or the like is supported by artificial rocks 10 that are cast to the bedrock as shown in FIG. 18, or as shown in FIG. It is conceivable to support the building with a pile foundation 11 that has been driven into the bedrock. However, the building that houses the central control room 9 is generally not very large.
There is a possibility that the proportions of the structure including the building and the building will be extremely slender, and the foundation will be lifted in the event of an earthquake, resulting in reduced seismic safety. In addition, even when the building is supported by the pile foundation 11, the pile foundation 11 is greatly deformed during the occurrence of an earthquake depending on the properties of the ground between the ground surface and the rock, and the structural integrity of the pile foundation 11 can be sufficiently ensured. May be gone.

In addition, in the case of a site having a shallow bedrock and severe seismic conditions, the building that houses the central control room 9 and the like has a small flat area, so that there is a possibility that the building will rise when an earthquake occurs. However, there is a possibility that sufficient safety cannot be secured as a building.

Accordingly, an object of the present invention is to solve the above-mentioned various problems, to install a plurality of reactors on the premises, to achieve extremely high safety, and to reduce the construction cost. To provide a nuclear power plant.

[0014]

According to a first aspect of the present invention, there is provided a nuclear power plant in which a plurality of nuclear reactors are installed on a premises, and a plurality of nuclear reactors each containing a plurality of cores therein. A reactor vessel, a plurality of reactor containment vessels each containing the plurality of reactor vessels therein, and a reactor building containing all of the plurality of reactor containment vessels inside, the reactor The horizontal sectional shape of the building is substantially circular or substantially square.

According to a second aspect of the present invention, in the nuclear power plant, the reactor building includes a reactor building containing the plurality of reactor containment vessels and an annex building provided around the reactor building. A horizontal section of the reactor building is formed to be substantially square by the reactor building and the annex building.

According to a third aspect of the present invention, in the nuclear power plant, the reactor building further includes a central earthquake-resistant wall provided between the plurality of reactor containment vessels, and each of the plurality of reactor containment vessels. And a peripheral earthquake-resistant wall provided on the periphery.

The nuclear power plant according to the invention of claim 4 is characterized in that the central shear wall and the peripheral shear wall have substantially the same amount of wall in two directions orthogonal to each other in a horizontal plane.

According to a fifth aspect of the present invention, in the nuclear power plant, the reactor building further includes a plurality of secondary storage facilities accommodating each of the plurality of reactor containment vessels, and the plurality of secondary storage facilities. A central separation wall for separating the secondary storage facilities from each other.

In the nuclear power plant according to the present invention, a tie line is provided between the plurality of reactor systems.
The plurality of reactors can use each other's system via the tie line.

The nuclear power plant according to the invention of claim 7 is characterized in that the central control rooms of the plurality of reactors are housed inside the reactor building.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment Hereinafter, a first embodiment of a nuclear power plant according to the present invention will be described with reference to FIGS. The same members as those of the above-described conventional nuclear power plant are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a longitudinal sectional view of a nuclear power plant according to this embodiment, and FIG. 2 is a plan sectional view showing a schematic configuration of the nuclear power plant according to this embodiment. As shown in FIGS. 1 and 2, the nuclear power plant according to the present embodiment includes a reactor building 20 having a substantially columnar overall shape. Two secondary storage facilities 3, 3 are housed inside the reactor building 20, and between these secondary storage facilities 3, 3, the secondary storage facilities 3, 3 are completely separated from each other. In this manner, a central separation wall 21 is provided. Inside the secondary containment facility 3, important equipment for operating the nuclear reactor, important safety-related equipment used in the event of an accident, and important equipment for maintenance and inspection are stored. Further, the secondary storage facility 3 also functions as a barrier against the diffusion of radioactive materials at the time of an accident.

Reactor containment vessels 2, 2 are provided inside the two secondary containment facilities 3, 3, respectively. Inside these containment vessels 2, 2, the suppression pool 4,
4 are provided. These pressure suppression pools 4 and 4 condense the steam released into the reactor containment vessels 2 and 2 in the event of a coolant loss accident (LOCA) or the like, and increase the internal pressure of the reactor containment vessels 2 and 2. It has functions such as suppression. Further, reactor pressure vessels 1 and 1 as reactor vessels are provided inside the two reactor containment vessels 2 and 2 respectively, and a core (not shown) is provided inside the reactor pressure vessels 1 and 1. ) Are stored respectively. As shown in FIG. 2, turbine buildings 5 and 5 are provided next to the reactor building 20, and these turbine buildings 5 and 5 are provided.
Between them, a waste treatment building 6 and a service building 7 are provided. In FIG. 2, reference numeral 8 indicates a site boundary, and the reactor building 20 is provided at the center of the site.

As described above, according to the nuclear power plant of the present embodiment, two reactors are housed inside one reactor building 20, so that the reactor building 20 to the site boundary 8 Therefore, it is not necessary to increase the wall thickness of the reactor building 20 to increase the radiation shielding effect. As a result, an increase in the weight of the reactor building 20 can be avoided, so that the seismic stability of the reactor building 20 can be sufficiently ensured, and the bottom area of the reactor building 20 increases. Therefore, the seismic stability of the reactor building 20 is further improved.

Further, according to the nuclear power plant according to the present embodiment, the central separation wall 2 is provided between the two secondary storage facilities 3 and 3.
1, the secondary storage facilities 3, 3 are completely separated from each other, so that even if an accident occurs in one of the nuclear reactors, the influence on the other healthy nuclear reactor can be minimized.

Next, a modification of this embodiment will be described with reference to FIG. As described above, in the nuclear power plant according to the present embodiment, two nuclear reactors are housed inside one nuclear reactor building 20, and this modification makes effective use of this feature between the two nuclear reactors. The facilities are designed to be shared.
That is, as shown in FIG. 3, in the nuclear power plant according to the present modification, a common facility 22 is provided between the two reactors inside the reactor building 20, and the common facility 22 is shared by the two reactors. It is configured to be. As a specific example of the common facility 22, a repair room for a reactor internal pump (RIP) / control rod drive mechanism (CRD) can be given, but it is not necessarily limited to this.

As described above, according to the nuclear power plant of the present modified example, the shared facility 22 can be shared by two reactors, so that the nuclear power plant can be compared with a case where a predetermined facility is provided for each reactor. The volume of the furnace building 20 can be reduced, and the construction cost can be significantly reduced.

Second Embodiment Next, a second embodiment of the nuclear power plant according to the present invention will be described with reference to FIG. The same members as those of the above-described conventional nuclear power plant or the nuclear power plant according to the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 4 is a plan sectional view showing a schematic configuration of the nuclear power plant according to the present embodiment. As shown in FIG. 4, the reactor building 30 has a substantially cylindrical shape as in the first embodiment. The overall shape is provided. Two reactor containment vessels 2 are housed inside the reactor building 30, and a central earthquake-resistant wall 31 is provided between the reactor containment vessels 2. Further, inside the reactor building 30, a surrounding earthquake-resistant wall 32 is provided so as to surround each of the reactor containment vessels 2, 2. The wall thickness and the like of the central earthquake-resistant wall 31 and the peripheral earthquake-resistant wall 32 are adjusted so that the wall amounts in the X direction and the Y direction orthogonal to each other in the horizontal plane shown in FIG. In addition,
The center earthquake-resistant wall 31 may also have the function of the center separation wall 21 in the above-described first embodiment.

As described above, according to the nuclear power plant of the present embodiment, the central earthquake-resistant wall 31 and the peripheral earthquake-resistant wall 32 are provided inside the reactor building 30, so that not only the seismic stability is improved, but also the reactor building is improved. Even when the reactor 30 is buried deep in the ground, it can sufficiently withstand a large earth pressure load applied to the reactor building 30.

Further, according to the nuclear power plant of the present embodiment, the central earthquake-resistant wall 31 and the peripheral earthquake-resistant wall 32 are formed so that the wall amounts in the XY directions orthogonal to each other in the horizontal plane are substantially the same. Therefore, characteristics such as the structure of the reactor building 30 and the stability of the building at the time of the occurrence of an earthquake do not differ between two orthogonal directions, and the design of the reactor building 30 becomes extremely easy.

The modification will be described with reference to FIG. 5 of a modification of a nuclear plant according to the present embodiment. FIG. 5 is a plan sectional view showing a schematic configuration of a nuclear power plant according to the present modification. In this nuclear power plant, the outer wall 33 of the reactor building 30 is used for reducing the diameter of the reactor building 30 and the like.
The distance between the reactor and the containment vessel 2 is reduced. Therefore, the surrounding earthquake-resistant wall 32 is eliminated between the outer wall 33 and the containment vessel 2 as unnecessary.

As described above, according to the nuclear power plant of the present modification, the surrounding earthquake-resistant wall 32 is not provided between the outer wall 33 of the reactor building 30 and the containment vessel 2, so that the reactor building 30 Can be reduced in diameter.

Third Embodiment Next, a third embodiment of the nuclear power plant according to the present invention will be described with reference to FIG. Note that the same members as those of the above-described conventional nuclear power plant or each of the above embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 6 is a plan sectional view showing a schematic configuration of the nuclear power plant according to the present embodiment. As shown in FIG. 6, a reactor building 41 having a rectangular horizontal sectional shape is housed inside the reactor building 40, and two reactor containment vessels are housed inside the reactor building 41. 2, 2 are stored. In addition, reactor building 4
An annex building 42 is provided around the reactor building 1.
Reactor building 40 constituted by 1 and annex building 42
Is formed such that its horizontal cross-sectional shape is square.

As described above, according to the nuclear power plant of the present embodiment, the reactor building 40 is formed so that its horizontal cross-sectional shape is square, so that the structure of the reactor building 40 and the stability of the building at the time of an earthquake occur. The characteristics such as the properties are not different in the two orthogonal directions (X-Y directions) shown in FIG. 6, and the design of the reactor building 40 becomes extremely easy.

Further, according to the nuclear power plant of the present embodiment, the auxiliary building 42 is provided continuously over the entire circumference of the reactor building 41. Can be secured.

First Modification Next, a first modification of the present embodiment will be described with reference to FIG. In the above-described embodiment, the auxiliary building 42 is provided over the entire circumference of the reactor building 41 as shown in FIG. 6, but the nuclear power plant according to the present modified example has a rectangular cross section as shown in FIG. The reactor building 41 is configured such that the auxiliary building 42 is not provided on one short side of the reactor building 41.

As described above, according to the nuclear power plant of the present modification, the auxiliary building 4 is
2, the length of one side of the reactor building 40 having a square cross section can be shortened.
The construction cost can be reduced by making the entire apparatus compact. Since the auxiliary building 42 is provided on the other short side of the reactor building 41, the mobility of the workers in the auxiliary building 42 is ensured.

Second Modification Next, a second modification of the present embodiment will be described with reference to FIG. In the above-described embodiment, the auxiliary building 42 is provided over the entire circumference of the reactor building 41 as shown in FIG. 6, but the nuclear power plant according to the present modified example has a rectangular cross section as shown in FIG. It is configured such that the accessory ridges 42 are not provided on any of the short sides of the reactor building 41, but the accessory ridges 42 are provided only on the long sides thereof.

As described above, according to the nuclear power plant of the present modified example, the auxiliary building 42 is not provided on both short sides of the reactor building 41, so that the reactor building 40 having a square cross section is provided.
The length of one side of the reactor building can be made shorter than that of the first modification, and the entire reactor building 40 can be made more compact to reduce the construction cost.

Fourth Embodiment Next, a fourth embodiment of the nuclear power plant according to the present invention will be described with reference to FIG. The same members as those of the above-described conventional nuclear power plant or each of the above embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 9 is a plan sectional view showing a schematic configuration of a nuclear power plant according to the present embodiment. As shown in FIG. 9, the reactor building 50 has a square horizontal structure as in the third embodiment. It has a cross-sectional shape. The reactor building 50 contains two reactor containment vessels 2, 2, and a central earthquake-resistant wall 51 is provided between the reactor containment vessels 2, 2. Further, the reactor building 50
Is provided with a surrounding earthquake-resistant wall 52 so as to surround each of the containment vessels 2 and 2. The wall thickness and the like of the central earthquake-resistant wall 51 and the peripheral earthquake-resistant wall 52 are adjusted so that the wall amounts in the X direction and the Y direction orthogonal to each other in the horizontal plane shown in FIG.

As described above, according to the nuclear power plant of the present embodiment, the central earthquake-resistant wall 51 and the peripheral earthquake-resistant wall 52 are provided inside the reactor building 50, so that not only the seismic stability is improved but also the reactor building is improved. Even when the reactor 50 is buried deep in the ground, it can sufficiently withstand a large earth pressure load applied to the reactor building 50.

In the nuclear power plant according to the present embodiment, the central earthquake-resistant wall 51 and the peripheral earthquake-resistant wall 52 are formed so that the wall amounts in the X-Y directions orthogonal to each other in the horizontal plane are substantially the same. Therefore, characteristics such as the structure of the reactor building 50 and the stability of the building at the time of occurrence of an earthquake do not differ between the two orthogonal directions, and the design of the reactor building 50 becomes extremely easy.

The modification will be described with reference to FIG. 10 of a modification of a nuclear plant according to the present embodiment. FIG. 10 is a plan sectional view showing a schematic configuration of a nuclear power plant according to the present modification. In this nuclear power plant, the outer wall 53 of the reactor building 50 is used for reasons such as reducing the size of the reactor building 50. The distance between the reactor and the containment vessel 2 is reduced.
Therefore, the surrounding earthquake-resistant wall 52 between the outer wall 53 and the containment vessel 2 is unnecessary and is deleted.

As described above, according to the nuclear power plant of the present modification, the surrounding earthquake-resistant wall 52 is not provided between the outer wall 53 of the reactor building 50 and the containment vessel 2, so that the reactor building 50 It is possible to reduce the overall size.

Fifth Embodiment Next, a fifth embodiment of the nuclear power plant according to the present invention will be described with reference to FIGS. The same members as those of the above-described conventional nuclear power plant or each of the above embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

The nuclear power plant according to the present embodiment is shown in FIG.
In the nuclear power plant according to the first embodiment, a tie line is provided between two reactor systems, and the other reactor system can be used via the tie line. is there. Specifically, as shown in FIG. 11, a plurality of tie lines 34 penetrating the central separation wall 21,
34, 34, and these tie lines 34, 34, 3
4, the A-system areas 35, 35, and B of the two reactors
The respective areas of the system areas 36 and 36 and the C areas 37 and 37 are connected to each other. FIG. 12 illustrates a schematic system diagram illustrating a case where the residual heat removal systems (RHR) 38 of both reactors are connected to each other by the tie line 34. Needless to say, the tie line 34 can be provided for a system other than the RHR.

As described above, according to the nuclear power plant of the present embodiment, since the systems of both reactors, for example, the RHRs are connected to each other by the tie line 34, the system of one reactor is connected to the system of the other reactor. It can be used as a backup, and the safety of a nuclear power plant can be greatly improved without a significant increase in construction costs.

Sixth Embodiment Next, a sixth embodiment of the nuclear power plant according to the present invention will be described with reference to FIG. The same members as those of the above-described conventional nuclear power plant or each of the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 13 is a plan sectional view showing a schematic configuration of a nuclear power plant according to the present embodiment. The nuclear power plant according to the present embodiment is a reactor building of the nuclear power plant according to the first embodiment shown in FIG. The central control room 20 and the related equipment 9 which are important for ensuring the safety of the nuclear reactor and have extremely high seismic importance are accommodated in the interior of the reactor 20.

As described above, according to the nuclear power plant of the present embodiment, the central control room 9 and the like, which are important for safety, are accommodated in the reactor building 20. However, as in the conventional nuclear power plant shown in FIG. 18 and FIG.
It is not necessary to separately provide a building supported by artificial rocks 10 or foundation piles 11 driven into the bedrock to store the rocks, and the central control room 9 and the like are installed in the reactor building 20 on which the rocks are mounted. This greatly improves the safety of the nuclear power plant in terms of earthquake resistance.

Seventh Embodiment Next, a seventh embodiment of the nuclear power plant according to the present invention will be described with reference to FIG. The same members as those of the above-described conventional nuclear power plant or each of the above embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 14 is a plan sectional view showing a schematic configuration of the nuclear power plant according to the present embodiment. As shown in FIG. 14, the reactor building 60 has a square horizontal sectional shape. Further, four reactor containment vessels 2, 2, 2, 2 are housed inside the reactor building 60, and a pair of reactor containment vessels 2, 2, 2, 2 The central earthquake-resistant walls 51, 51 are provided so as to cross in a cross shape. Here, since the length of the pair of central earthquake-resistant walls 51, 51 is the same, the wall amounts in the X direction and the Y direction orthogonal to each other in the horizontal plane are also the same.

As described above, according to the nuclear power plant of the present embodiment, the central shear wall 51,
The provision of 51 greatly improves seismic stability.

Further, according to the nuclear power plant of the present embodiment, the central seismic walls 51, 51 have the same amount of wall in the X and Y directions orthogonal to each other in the horizontal plane, so that the structure of the reactor building 60 and the earthquake Characteristics such as building stability at the time of occurrence do not differ between the two orthogonal directions, and the design of the reactor building 60 becomes extremely easy.

Further, since the length of the pair of central earthquake-resistant walls 51, 51 is the same, it is not necessary to adjust the wall thickness and the like in order to make the wall amounts of both the same.

Modification When a nuclear power plant is installed at a site deep in the bedrock level, as a modification of the nuclear power plant according to the present embodiment, a surrounding earthquake-resistant wall can be provided around the reactor containment vessel 2. In this way, even when the reactor building 60 is buried deep in the ground, it is possible to sufficiently withstand a large earth pressure load applied to the reactor building 60.

[0059]

As described above, according to the nuclear power plant of the present invention, a plurality of reactors containing reactor vessels inside a reactor building having a substantially circular or substantially square horizontal cross-sectional shape. Since all the containers are stored, multiple reactors can be installed on the premises, and safety can be greatly improved.
Construction costs can also be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a nuclear power plant according to a first embodiment of the present invention.

FIG. 2 is a plan sectional view showing a schematic configuration of the nuclear power plant according to the first embodiment of the present invention.

FIG. 3 is a plan sectional view showing a schematic configuration of a modification of the nuclear power plant according to the first embodiment of the present invention.

FIG. 4 is a plan sectional view showing a schematic configuration of a nuclear power plant according to a second embodiment of the present invention.

FIG. 5 is a plan sectional view showing a schematic configuration of a modification of the nuclear power plant according to the second embodiment of the present invention.

FIG. 6 is a plan sectional view showing a schematic configuration of a nuclear power plant according to a third embodiment of the present invention.

FIG. 7 is a plan sectional view showing a schematic configuration of a first modification of the nuclear power plant according to the third embodiment of the present invention.

FIG. 8 is a plan sectional view showing a schematic configuration of a second modification of the nuclear power plant according to the third embodiment of the present invention.

FIG. 9 is a plan sectional view showing a schematic configuration of a nuclear power plant according to a fourth embodiment of the present invention.

FIG. 10 is a plan sectional view showing a schematic configuration of a modification of the nuclear power plant according to the fourth embodiment of the present invention.

FIG. 11 is a plan sectional view showing a schematic configuration of a nuclear power plant according to a fifth embodiment of the present invention.

FIG. 12 is a plan sectional view showing a tie line portion of a nuclear power plant according to a fifth embodiment of the present invention.

FIG. 13 is a plan sectional view showing a schematic configuration of a nuclear power plant according to a sixth embodiment of the present invention.

FIG. 14 is a plan sectional view showing a schematic configuration of a nuclear power plant according to a seventh embodiment of the present invention.

FIG. 15 is a longitudinal sectional view showing a schematic configuration of a conventional nuclear power plant (ABWR).

FIG. 16 is a plan sectional view showing a schematic configuration of a conventional nuclear power plant when a plurality of nuclear reactors are installed on a site.

FIG. 17 is a cross-sectional plan view showing a schematic configuration when two conventional reactor buildings are integrated.

FIG. 18 is a longitudinal sectional view showing a schematic configuration of a building supported by artificial rocks that have been cast to a bedrock.

FIG. 19 is a longitudinal sectional view showing a schematic configuration of a building supported by a pile foundation that has been driven into rock.

[Explanation of symbols]

 1 Reactor Pressure Vessel 2 Reactor Containment Vessel 3 Secondary Containment Facility 8 Site Boundary 9 Main Control Room and Related Facilities 20, 30 Cylindrical Reactor Building 21 Central Separation Wall 22 Common Facilities 31, 51 Central Shear Wall 32, 52 Surrounding shear walls 33, 53 Outer wall of reactor building 34 Tie line 38 Residual heat removal system (RHR) 40, 50, 60 Reactor building with square cross section 41 Reactor building 42 Attached building

Claims (7)

[Claims] 1. A nuclear power plant in which a plurality of reactors are installed on a premises, a plurality of reactor vessels accommodating a plurality of reactor cores therein, and each of the plurality of reactor vessels inside a plurality of reactor vessels. A plurality of contained reactor containment vessels, and a reactor building containing all of the plurality of reactor containment vessels therein, wherein the horizontal cross-sectional shape of the reactor building is substantially circular or substantially square. Nuclear power plant featured. 2. The reactor building according to claim 1, further comprising: a reactor building containing the plurality of reactor containment vessels, and an annex building provided around the reactor building. 2. The nuclear power plant according to claim 1, wherein a horizontal cross-sectional shape of the reactor building is formed to be substantially square by a ridge. 3. The reactor building further includes a central earthquake-resistant wall provided between the plurality of reactor containment vessels, and a peripheral earthquake-resistant wall provided around each of the plurality of reactor containment vessels. The nuclear power plant according to claim 1, wherein the nuclear power plant has: 4. The nuclear power plant according to claim 3, wherein the central shear wall and the peripheral shear wall have substantially the same amount of wall in two directions orthogonal to each other in a horizontal plane. 5. The nuclear reactor building further includes a plurality of secondary storage facilities accommodating each of the plurality of reactor containment vessels, and the secondary storage facility is located between the plurality of secondary storage facilities. The nuclear power plant according to any one of claims 1 to 4, further comprising a central separating wall for separating the nuclear power plants from each other. 6. A system according to claim 1, wherein a tie line is provided between the plurality of reactor systems, and the plurality of reactors can use each other's systems via the tie line. A nuclear power plant according to any one of claims 1 to 5. 7. The nuclear power plant according to claim 1, wherein the central control rooms of the plurality of reactors are housed inside the reactor building.